SNA Device Types
Question for all: In the SNA hierarchy there are defined types 5,4,2 and 1 nodes. >From what I've read so far I've assembled the following: Type 5IBM Mainframe (Runs VTAM) SSCP & PU5 Type 43705/3725/3745/3746 FEP/Communications ControllersPU4 Type 23174 Cluster Controller PU2 Type 2Token Ring SNA GatewayPU2 Type 1Token Ring Device LU Type 1TN3270 Terminals SLU Type 5 & 2Cisco Router acting as DSPU Concentrator PU5 & PU2 Is this anywhere near close? Does an ethernet client running a TN3270 session also appear as an SLU or LU? Sorry if this is basic but SNA is the area that I am definately weakest and while I can configure up basic DLSW+ services I prefer to understand the underlying principles. Darren ___ UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html FAQ, list archives, and subscription info: http://www.groupstudy.com Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
SNA device types
Darren, you are mostly right, but a bit mixed up. In SNA there are PU types and LU types. The PU type describes the function/capabilities of the device within the SNA hierarchy: PU types: 5VTAM (SSCP) 4FEP 3 there is no PU type 3 23274/3174 cluster controller, 3777 RJE station, other devices (typically connected to a FEP by a leased line running SDLC 1974-1980s) . Token ring SNA gateway (1990s). SNA gateway on a LAN with a CISC router running DLSw to another Cisco router on a token ring (1990s-). Any SNA gateway product running on a server will be a PU type 2. 1I've forgotten what that was. then when peer to peer networking came into SNA: 2.1 APPN (advanced program to program networking) supports independant LUs. Includes more recent 3174 etc cluster controllers. The type of the LU describes what data stream it uses to communicate. ie the format of the data sent from one LU to another. LU types new-fangled ones: 6.1 application to application CICS - not used much 6.2 application to application (APPC) classic ones: 3 printer attached to a 3174 cluster controller using 3270 data stream 2 3270 display terminal (3278, 3179 etc) your basic "green screen", or emulation of one on a PC 1 SNA character set - printer or RJE station 0 content of data stream not specified (this was used for program to program communication before APPC/APPN came in eg Solve:Netmaster INMC, an Aussie product) SLU : in classical SNA a session is between two LUs. One of the LUs is the Primary (PLU), the other the Secondary (SLU). The primary LU is the application on the mainframe, such as CICS, TSO etc. The secondary LU is the user's terminal. Hope this isn't too overwhelming and it helps. Feel free to ask more questions! Jenny --- Question for all: In the SNA hierarchy there are defined types 5,4,2 and 1 nodes. >From what I've read so far I've assembled the following: Type 5IBM Mainframe (Runs VTAM) SSCP & PU5 Type 43705/3725/3745/3746 FEP/Communications ControllersPU4 Type 23174 Cluster Controller PU2 Type 2Token Ring SNA GatewayPU2 Type 1Token Ring Device LU Type 1TN3270 Terminals SLU Type 5 & 2Cisco Router acting as DSPU Concentrator PU5 & PU2 Is this anywhere near close? Does an ethernet client running a TN3270 session also appear as an SLU or LU? Sorry if this is basic but SNA is the area that I am definately weakest and while I can configure up basic DLSW+ services I prefer to understand the underlying principles. Darren ___ UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html FAQ, list archives, and subscription info: http://www.groupstudy.com Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: SNA device types
PU 2.1 is not APPN. PU 2.1 is more a LEN node ( low-entry node ) and it can exist without APPN. PU 2.1 is the PU type required for the LU 6.2 sessions. -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] Sent: Monday, June 05, 2000 7:06 PM To: [EMAIL PROTECTED] Cc: [EMAIL PROTECTED] Subject: SNA device types Darren, you are mostly right, but a bit mixed up. In SNA there are PU types and LU types. The PU type describes the function/capabilities of the device within the SNA hierarchy: PU types: 5VTAM (SSCP) 4FEP 3 there is no PU type 3 23274/3174 cluster controller, 3777 RJE station, other devices (typically connected to a FEP by a leased line running SDLC 1974-1980s) . Token ring SNA gateway (1990s). SNA gateway on a LAN with a CISC router running DLSw to another Cisco router on a token ring (1990s-). Any SNA gateway product running on a server will be a PU type 2. 1I've forgotten what that was. then when peer to peer networking came into SNA: 2.1 APPN (advanced program to program networking) supports independant LUs. Includes more recent 3174 etc cluster controllers. The type of the LU describes what data stream it uses to communicate. ie the format of the data sent from one LU to another. LU types new-fangled ones: 6.1 application to application CICS - not used much 6.2 application to application (APPC) classic ones: 3 printer attached to a 3174 cluster controller using 3270 data stream 2 3270 display terminal (3278, 3179 etc) your basic "green screen", or emulation of one on a PC 1 SNA character set - printer or RJE station 0 content of data stream not specified (this was used for program to program communication before APPC/APPN came in eg Solve:Netmaster INMC, an Aussie product) SLU : in classical SNA a session is between two LUs. One of the LUs is the Primary (PLU), the other the Secondary (SLU). The primary LU is the application on the mainframe, such as CICS, TSO etc. The secondary LU is the user's terminal. Hope this isn't too overwhelming and it helps. Feel free to ask more questions! Jenny --- Question for all: In the SNA hierarchy there are defined types 5,4,2 and 1 nodes. >From what I've read so far I've assembled the following: Type 5IBM Mainframe (Runs VTAM) SSCP & PU5 Type 43705/3725/3745/3746 FEP/Communications ControllersPU4 Type 23174 Cluster Controller PU2 Type 2Token Ring SNA GatewayPU2 Type 1Token Ring Device LU Type 1TN3270 Terminals SLU Type 5 & 2Cisco Router acting as DSPU Concentrator PU5 & PU2 Is this anywhere near close? Does an ethernet client running a TN3270 session also appear as an SLU or LU? Sorry if this is basic but SNA is the area that I am definately weakest and while I can configure up basic DLSW+ services I prefer to understand the underlying principles. Darren ___ UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html FAQ, list archives, and subscription info: http://www.groupstudy.com Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] ___ UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html FAQ, list archives, and subscription info: http://www.groupstudy.com Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: SNA device types
Excellent summary, Jenny. Let me add a couple of things. I'm just out of the hospital after getting traceroutes of my heart, and it seems vaguely appropriate to talk about SNA. SNA is an old technology, possibly dating back to the Garden of Eden. Is it any coincidence that the first three letters of evil are SNAke? Seriously, IBM did a great deal of very good work in making SNA reliable and extremely measurable. It isn't very flexible, but that wasn't a design goal. >Darren, >you are mostly right, but a bit mixed up. > >In SNA there are PU types and LU types. Another way to think of Physical Units (PU's, which don't have to be physical) and Logical Units (LU's, which seem illogical at times), is that PUs are network resources that do not directly involve application communications. While SNA doesn't precisely fit the OSI model, LU's are more at layer 6/7. PUs must activate before LU's can do anything. First, the SSCP (PU5) activates any FEP (PU4). PU4 functionality is built into the AS/400 operating system and is not a separate box. Important: the Cisco IBM Interface emulates a 3172, which is a PU2, _not_ a PU4. You can get some, but not all, PU4 functions by adding IOS features. If you are considering replacing a FEP, ask yourself first if it could be replaced with an IBM 3172 before asking if it could be replaced with a CIP in a router. Anyway, in a mainframe environment, the SSCP, which owns a set of resources called a domain, activates the PU4's by creating SSCP-PU sessions. Each PU4, which is owned by the PU5, owns a set of resources called a subarea. IBM "logical addresses" are generally subarea/element. All PU and LU types can have IBM SNA addresses. Via the PU4, the SSCP then activates the various remote PU2s, with a couple of exceptions -- the SSCP directly activates the 3172 or CIP, not going through a PU4. Terminal controllers are PU2. Once they are activated, they can have one end of an LU on them. Think of each Secondary LU as a keyboard/display pair that can be assigned to a particular "application" under a primary LU. Primary LUs are more application service interfaces than true applications. An "application monitor" like CICS, IMS, or TSO actually provides services to applications, just as the OSI application layer is not itself an application but a set of functions that provides services to applications. > >The PU type describes the function/capabilities of the device within the SNA >hierarchy: >PU types: >5VTAM (SSCP) >4FEP >3 there is no PU type 3 Correct. There probably was never a PU3. I have heard two explanations within IBM, one that there was an early proposal for lines to be PU3, and the other that two different SNA groups started numbering, respectively, from 5 and from 3. At least Rich McGee, who was head of the IBM SNA architecture group, and John Aschenbrenner, one of the principal designers, couldn't give me a better explanation. >23274/3174 cluster controller, 3777 RJE station, other devices (typically >connected to a FEP by a leased line running SDLC 1974-1980s) . Token ring SNA >gateway (1990s). SNA gateway on a LAN with a CISC router running >DLSw to another >Cisco router on a token ring (1990s-). Any SNA gateway product running on a >server will be a PU type 2. >1I've forgotten what that was. PU type 1 were really stupid terminals. Reaching back in my memory archives, I think it was the 3176 that was an SNA-attached Selectric typewriter. Whatever the number, there was one. Frightening...a fair number of people on the list probably haven't ever seen a Selectric typewriter. > > >then when peer to peer networking came into SNA: >2.1 APPN (advanced program to program networking) supports independant LUs. >Includes more recent 3174 etc cluster controllers. > > >The type of the LU describes what data stream it uses to communicate. ie the >format of the data sent from one LU to another. > >LU types >new-fangled ones: >6.1 application to application CICS - not used much >6.2 application to application (APPC) >classic ones: >3 printer attached to a 3174 cluster controller using 3270 data stream >2 3270 display terminal (3278, 3179 etc) your basic "green screen", or >emulation of one on a PC >1 SNA character set - printer or RJE station >0 content of data stream not specified (this was used for program to program >communication before APPC/APPN came in eg Solve:Netmaster INMC, an Aussie >product) > >SLU : >in classical SNA a session is between two LUs. One of the LUs is the Primary >(PLU), the other the Secondary (SLU). The primary LU is the application on the >mainframe, such as CICS, TSO etc. The secondary LU is the user's terminal. > >Hope this isn't too overwhelming and it helps. Feel free to ask more >questions! > >Jenny > >- >-- >Question for all: > >In the SNA hierarchy there are defined types
Re: SNA device types
Never seen a Selectric typewriter??? I actually own one... [=`) >From: "Howard C. Berkowitz" <[EMAIL PROTECTED]> >Reply-To: "Howard C. Berkowitz" <[EMAIL PROTECTED]> >To: [EMAIL PROTECTED] >Subject: Re: SNA device types >Date: Tue, 6 Jun 2000 14:17:31 -0400 >... >PU type 1 were really stupid terminals. Reaching back in my memory >archives, I think it was the 3176 that was an SNA-attached Selectric >typewriter. Whatever the number, there was one. Frightening...a fair >number of people on the list probably haven't ever seen a Selectric >typewriter. > Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com ___ UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html FAQ, list archives, and subscription info: http://www.groupstudy.com Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: SNA device types
> >PU type 1 were really stupid terminals. Reaching back in my memory > >archives, I think it was the 3176 that was an SNA-attached Selectric > >typewriter. Whatever the number, there was one. Frightening...a fair > >number of people on the list probably haven't ever seen a Selectric > >typewriter. > > > Never seen a Selectric typewriter??? I actually own one... > > [=`) > Selectric, that is a real fancy machine. I still attempt to use my Old Remington No. 10 at least once a month. My No. 7 is getting old and the keys just aren't like they used to be, after all it is a 103 year old typewriter. David C Prall, CCDP CCNP MCSE MCNE [EMAIL PROTECTED] http://dcp.dcptech.com ___ UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html FAQ, list archives, and subscription info: http://www.groupstudy.com Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: SNA device types
On Tue, 6 Jun 2000, David C Prall wrote: > > >PU type 1 were really stupid terminals. Reaching back in my memory > > >archives, I think it was the 3176 that was an SNA-attached Selectric > > >typewriter. Whatever the number, there was one. Frightening...a fair > > >number of people on the list probably haven't ever seen a Selectric > > >typewriter. > > > > > Never seen a Selectric typewriter??? I actually own one... > > > > [=`) > > > Selectric, that is a real fancy machine. I still attempt to use my Old > Remington No. 10 at least once a month. My No. 7 is getting old and the keys > just aren't like they used to be, after all it is a 103 year old typewriter. What's a typewriter? Kind of like a printer with a keyboard attached? ;-) -- Jay Hennigan - Network Administration - [EMAIL PROTECTED] NetLojix Communications, Inc. NASDAQ: NETX - http://www.netlojix.com/ WestNet: Connecting you to the planet. 805 884-6323 ___ UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html FAQ, list archives, and subscription info: http://www.groupstudy.com Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: SNA device types
> > > >PU type 1 were really stupid terminals. Reaching back in my memory > > > >archives, I think it was the 3176 that was an SNA-attached Selectric > > > >typewriter. Whatever the number, there was one. Frightening...a fair > > > >number of people on the list probably haven't ever seen a Selectric > > > >typewriter. > > > > > > > Never seen a Selectric typewriter??? I actually own one... > > > > > > [=`) > > > > > Selectric, that is a real fancy machine. I still attempt to use my Old > > Remington No. 10 at least once a month. My No. 7 is getting old and the keys > > just aren't like they used to be, after all it is a 103 year old typewriter. > > What's a typewriter? Kind of like a printer with a keyboard attached? > > ;-) > My 5 year old sons failed a test at school that involved objects and giving descriptions. My wife had to go to this evaluation about the test in order to determine if they were ready for progressing on to the next grade, or should they be held back. One of the items was a picture of a Typewriter, both of my boys answered "Puter" and missed the question. How many kids below the age of 20, have ever even seen a Typewriter. As far as I'm concerned, my kids got every question right. All they needed to do was answer the question, they are 5 and kids will be kids. I own about 20 Manual Typewriters, it sort of stems from my love of computers and understanding where all of this started. Just watching as the keys are pressed and the letters slam into the paper. (c: David C Prall, CCDP CCNP MCSE MCNE [EMAIL PROTECTED] http://dcp.dcptech.com ___ UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html FAQ, list archives, and subscription info: http://www.groupstudy.com Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: SNA device types
The first place where I was hired as a Dir. of MIS, considered Computer Word Processing to be IBM Selectrics with memory! "Howard C. Berkowitz" wrote: > Excellent summary, Jenny. Let me add a couple of things. I'm just > out of the hospital after getting traceroutes of my heart, and it > seems vaguely appropriate to talk about SNA. > > SNA is an old technology, possibly dating back to the Garden of Eden. > Is it any coincidence that the first three letters of evil are SNAke? > > Seriously, IBM did a great deal of very good work in making SNA > reliable and extremely measurable. It isn't very flexible, but that > wasn't a design goal. > > >Darren, > >you are mostly right, but a bit mixed up. > > > >In SNA there are PU types and LU types. > > Another way to think of Physical Units (PU's, which don't have to be > physical) and Logical Units (LU's, which seem illogical at times), is > that PUs are network resources that do not directly involve > application communications. While SNA doesn't precisely fit the OSI > model, LU's are more at layer 6/7. > > PUs must activate before LU's can do anything. First, the SSCP (PU5) > activates any FEP (PU4). PU4 functionality is built into the AS/400 > operating system and is not a separate box. > > Important: the Cisco IBM Interface emulates a 3172, which is a PU2, > _not_ a PU4. You can get some, but not all, PU4 functions by adding > IOS features. If you are considering replacing a FEP, ask yourself > first if it could be replaced with an IBM 3172 before asking if it > could be replaced with a CIP in a router. > > Anyway, in a mainframe environment, the SSCP, which owns a set of > resources called a domain, activates the PU4's by creating SSCP-PU > sessions. Each PU4, which is owned by the PU5, owns a set of > resources called a subarea. IBM "logical addresses" are generally > subarea/element. All PU and LU types can have IBM SNA addresses. > > Via the PU4, the SSCP then activates the various remote PU2s, with a > couple of exceptions -- the SSCP directly activates the 3172 or CIP, > not going through a PU4. > > Terminal controllers are PU2. Once they are activated, they can have > one end of an LU on them. Think of each Secondary LU as a > keyboard/display pair that can be assigned to a particular > "application" under a primary LU. > > Primary LUs are more application service interfaces than true > applications. An "application monitor" like CICS, IMS, or TSO > actually provides services to applications, just as the OSI > application layer is not itself an application but a set of functions > that provides services to applications. > > > > >The PU type describes the function/capabilities of the device within the SNA > >hierarchy: > >PU types: > >5VTAM (SSCP) > >4FEP > >3 there is no PU type 3 > > Correct. There probably was never a PU3. I have heard two > explanations within IBM, one that there was an early proposal for > lines to be PU3, and the other that two different SNA groups started > numbering, respectively, from 5 and from 3. At least Rich McGee, who > was head of the IBM SNA architecture group, and John Aschenbrenner, > one of the principal designers, couldn't give me a better explanation. > > >23274/3174 cluster controller, 3777 RJE station, other devices (typically > >connected to a FEP by a leased line running SDLC 1974-1980s) . Token ring SNA > >gateway (1990s). SNA gateway on a LAN with a CISC router running > >DLSw to another > >Cisco router on a token ring (1990s-). Any SNA gateway product running on a > >server will be a PU type 2. > >1I've forgotten what that was. > > PU type 1 were really stupid terminals. Reaching back in my memory > archives, I think it was the 3176 that was an SNA-attached Selectric > typewriter. Whatever the number, there was one. Frightening...a fair > number of people on the list probably haven't ever seen a Selectric > typewriter. > > > > > > >then when peer to peer networking came into SNA: > >2.1 APPN (advanced program to program networking) supports independant LUs. > >Includes more recent 3174 etc cluster controllers. > > > > > >The type of the LU describes what data stream it uses to communicate. ie the > >format of the data sent from one LU to another. > > > >LU types > >new-fangled ones: > >6.1 application to application CICS - not used much > >6.2 application to application (APPC) > >classic ones: > >3 printer attached to a 3174 cluster controller using 3270 data stream > >2 3270 display terminal (3278, 3179 etc) your basic "green screen", or > >emulation of one on a PC > >1 SNA character set - printer or RJE station > >0 content of data stream not specified (this was used for program to program > >communication before APPC/APPN came in eg Solve:Netmaster INMC, an Aussie > >product) > > > >SLU : > >in classical SNA a session is between two LUs. One of the LUs is the Primary > >(PLU), the other the Secondary (SLU). The primary LU is the application on the > >mai
Re: SNA device types
Can a typewriter print pictures ;) Mark Zabludovsky ~ CCNA Home: (215) 340-1440 [EMAIL PROTECTED] In a message dated 6/7/00 1:25:52 AM Eastern Daylight Time, [EMAIL PROTECTED] writes: << On Tue, 6 Jun 2000, Jay Hennigan wrote: > What's a typewriter? Kind of like a printer with a keyboard attached? See http://www.tuxedo.org/~esr/jargon/html/TV-Typewriters.html. >> ___ UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html FAQ, list archives, and subscription info: http://www.groupstudy.com Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: SNA device types
On Wed, 7 Jun 2000 [EMAIL PROTECTED] wrote: > Can a typewriter print pictures ;) Yep. A few mild examples... http://users.inetw.net/~mullen/ascii.htm -- Jay Hennigan - Network Administration - [EMAIL PROTECTED] NetLojix Communications, Inc. NASDAQ: NETX - http://www.netlojix.com/ WestNet: Connecting you to the planet. 805 884-6323 ___ UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html FAQ, list archives, and subscription info: http://www.groupstudy.com Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: SNA device types
I stand corrected Jay... ;) Those are pretty cool ;) Mark Zabludovsky ~ CCNA Home: (215) 340-1440 [EMAIL PROTECTED] In a message dated 6/7/00 2:15:52 AM Eastern Daylight Time, [EMAIL PROTECTED] writes: << > Can a typewriter print pictures ;) Yep. A few mild examples... http://users.inetw.net/~mullen/ascii.htm -- Jay Hennigan - Network Administration - [EMAIL PROTECTED] NetLojix Communications, Inc. NASDAQ: NETX - http://www.netlojix.com/ WestNet: Connecting you to the planet. 805 884-6323 >> ___ UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html FAQ, list archives, and subscription info: http://www.groupstudy.com Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: (off-topic) Selectrics, was SNA device types
On Tue, 6 Jun 2000, Thomas Lisa wrote: > The first place where I was hired as a Dir. of MIS, considered Computer Word > Processing to be IBM Selectrics with memory! Actually, the term "Word Processing" was coined by IBM. My father's office had a number of "Mag Card Selectric Typewriters" which were at the time very high-tech and expensive. A Selectric typewriter was connected via an umbilical to a deskside unit about the height and depth but half the width of a two-drawer file cabinet. This device had a slot which accepted a magnetic coated card the same size and shape as a Hollerith punch card. The typist would bang out a rough draft in "record" mode, backspacing and typing over errors, onto cheap paper. Then after proofreading and correction a piece of nice letterhead was inserted and the machine was set to "playback", typing a nice perfect copy. Each card held about a page of text. You could have cards of "canned" boilerplate and have the machine stop to have you switch cards. I even got to use it on weekends and evenings for high school term papers. At the time it was considered real space-age stuff. One of my teachers always wanted an original and a copy of papers. Anyone remember carbon paper? I just turned in two identical originals. The teacher knew something very strange was going on, especailly in cases where she would mark corrections and get back two fixed six-page originals the next day. Truly great fun. Probably used some of the same protocols at least as far as the Selectric interface. -- Jay Hennigan - Network Administration - [EMAIL PROTECTED] NetLojix Communications, Inc. NASDAQ: NETX - http://www.netlojix.com/ WestNet: Connecting you to the planet. 805 884-6323 ___ UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html FAQ, list archives, and subscription info: http://www.groupstudy.com Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: (off-topic) Selectrics, was SNA device types
Ahhh Carbon Paper, I remember it well. And typewriter erasers with little metal templates that allowed you to erase just one letter (sometimes) not to mention white out. Perhaps some of the "good-old-days" weren't so good! Tom Lisa, Instructor, CCNA, CCAI Community College of Southern Nevada Cisco Regional Networking Academy Jay Hennigan wrote: > On Tue, 6 Jun 2000, Thomas Lisa wrote: > > > The first place where I was hired as a Dir. of MIS, considered Computer Word > > Processing to be IBM Selectrics with memory! > > Actually, the term "Word Processing" was coined by IBM. My father's > office had a number of "Mag Card Selectric Typewriters" which were > at the time very high-tech and expensive. A Selectric typewriter > was connected via an umbilical to a deskside unit about the height and > depth but half the width of a two-drawer file cabinet. > > This device had a slot which accepted a magnetic coated card the same > size and shape as a Hollerith punch card. The typist would bang out a > rough draft in "record" mode, backspacing and typing over errors, onto > cheap paper. Then after proofreading and correction a piece of nice > letterhead was inserted and the machine was set to "playback", typing > a nice perfect copy. Each card held about a page of text. You could > have cards of "canned" boilerplate and have the machine stop to have > you switch cards. > > I even got to use it on weekends and evenings for high school term > papers. At the time it was considered real space-age stuff. One of > my teachers always wanted an original and a copy of papers. Anyone > remember carbon paper? I just turned in two identical originals. > The teacher knew something very strange was going on, especailly in > cases where she would mark corrections and get back two fixed six-page > originals the next day. Truly great fun. > > Probably used some of the same protocols at least as far as the Selectric > interface. > > -- > Jay Hennigan - Network Administration - [EMAIL PROTECTED] > NetLojix Communications, Inc. NASDAQ: NETX - http://www.netlojix.com/ > WestNet: Connecting you to the planet. 805 884-6323 ___ UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html FAQ, list archives, and subscription info: http://www.groupstudy.com Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
