Block mode terminals are somewhat similar to the forms based UIs we later got like HTML.
The 3290 was like a 4 split tmux session, it is such a beautiful device (https://ifdesign.com/en/winner-ranking/project/ibm-3290-info...). Perfect keyboard, plasma contrast and the right text color for long sessions. My understanding is they outlived themselves with long service in air traffic control (supplementing vector/raster displays), financial markets, and software development. Once upon a time people seemed to really care about doing things well.
IBM terminals were the original stateless clients. :)
I had a PS/2 Portable 70 for a while. It was a luggable Microchannel PC with a orange plasma display. Going through airports with it was a hassle as it didn't have batteries - I would have to find an outlet to power it on for airport security inspection.
Articles like this always paint a rosy picture of the 3270 but consider the limitations. Async style updates as commonly found on a VT designed program were tricky.
Now admittedly my own experience with the 3270 was through about three layers of obtuse IBM operating systems. Perhaps if I sat down with a 3270 and a bare OS I would consider them differently, but I always found them terribly limiting compared to a VT. More efficient sure, but much harder/impossible to do cool stuff on.
source: I was a night shift tape monkey for a IBM place for a few years. A fair amount of down time, access to a full set of manuals and an understanding boss meant I was doing more hacking on production mainframes than I probably should have been.
I'll give you props for studying the systems manuals and not the handmade Adventure maps drawn on green-bar paper and hidden behind the back of the last 3270 at the far end of the row of tape request consoles.
I was on the DEC side with an amber VT220 and always thought it was cool that the 3270 could scream "mount me now dammit!" in flashing red block letters while the operators weren't sure if they should drop the keys or pick up the lantern.
It was a mid sized mail order company, they had invested early with computers, and not changed much since. It was a very strange mix of odd old computer systems. An IBM mainframe batch processing backend with sco unix on the front end using pick databases as a sort of vertically integrated database and terminal ui.
When hired I had just missed the retirement of some sort of lockheed minicomputer they had used in the call center, which I would have loved to see. It was a very odd environment.
Hey, based on the picture, I used one of those 3179 models for about 6-7 years until my company replaced it with a desktop PC running terminal emulation software.
Years later, probably around 2003, when desktop apps started getting replaced by web apps (at least at my job), I remember making that connection between web browsers and 3270s. In the 1990s, clients got very fat (think powerbuilder), but then in the late 1990s and early 2000s much of the fat went to the server-side and the web browser became the thin(ish) client. The web browser was sort of acting as a block device (like the 3270) in the sense that the end-user filled data into fields and then sent the whole thing at once by hitting some button.
With Web 2.0, the client started to put on weight again. Then with mobile apps, the fat client was back, baby! It just keeps cycling.
I wonder when thin clients will come back into vogue again.
I've considered the BLIT to be the platonic ideal, a seamless environment there local or remote behaved the same, looked the same and acted the same - I guess the modern equivalent to that would be Citrix applications - but thats still not as seamless.
The IBM 3270 display family was amazing for its time - a character-oriented, block-mode terminal that supported light pens and APL keyboards in the '70s, as well as color graphics and a plasma display that supported four 80x24 logical screens in the early 80's. https://en.wikipedia.org/wiki/IBM_3270
Reminder that the X11 based x3270 client can be used to communicate with mainframes, including the "Hercules" IBM mainframe emulator that you can run on Linux/Windows/MacOS .
I used to use 3270-based stuff at IBM back in the mid-2000s, when I did tech support for their EPOS systems.
They had some hyper janky Windows XP Citrix client that ran 3270 terminals that kind of half-worked on some server somewhere, that then talked to the Big Iron. When it didn't work (it frequently didn't) it meant we got a lot of coffee breaks, so not the worst in the world.
Block mode terminals are somewhat similar to the forms based UIs we later got like HTML.
The 3290 was like a 4 split tmux session, it is such a beautiful device (https://ifdesign.com/en/winner-ranking/project/ibm-3290-info...). Perfect keyboard, plasma contrast and the right text color for long sessions. My understanding is they outlived themselves with long service in air traffic control (supplementing vector/raster displays), financial markets, and software development. Once upon a time people seemed to really care about doing things well.
IBM terminals were the original stateless clients. :)
I had a PS/2 Portable 70 for a while. It was a luggable Microchannel PC with a orange plasma display. Going through airports with it was a hassle as it didn't have batteries - I would have to find an outlet to power it on for airport security inspection.
Articles like this always paint a rosy picture of the 3270 but consider the limitations. Async style updates as commonly found on a VT designed program were tricky.
Now admittedly my own experience with the 3270 was through about three layers of obtuse IBM operating systems. Perhaps if I sat down with a 3270 and a bare OS I would consider them differently, but I always found them terribly limiting compared to a VT. More efficient sure, but much harder/impossible to do cool stuff on.
source: I was a night shift tape monkey for a IBM place for a few years. A fair amount of down time, access to a full set of manuals and an understanding boss meant I was doing more hacking on production mainframes than I probably should have been.
I'll give you props for studying the systems manuals and not the handmade Adventure maps drawn on green-bar paper and hidden behind the back of the last 3270 at the far end of the row of tape request consoles.
I was on the DEC side with an amber VT220 and always thought it was cool that the 3270 could scream "mount me now dammit!" in flashing red block letters while the operators weren't sure if they should drop the keys or pick up the lantern.
What sort of data were you work with back then? Bank stuff?
It was a mid sized mail order company, they had invested early with computers, and not changed much since. It was a very strange mix of odd old computer systems. An IBM mainframe batch processing backend with sco unix on the front end using pick databases as a sort of vertically integrated database and terminal ui.
When hired I had just missed the retirement of some sort of lockheed minicomputer they had used in the call center, which I would have loved to see. It was a very odd environment.
Hey, based on the picture, I used one of those 3179 models for about 6-7 years until my company replaced it with a desktop PC running terminal emulation software.
Years later, probably around 2003, when desktop apps started getting replaced by web apps (at least at my job), I remember making that connection between web browsers and 3270s. In the 1990s, clients got very fat (think powerbuilder), but then in the late 1990s and early 2000s much of the fat went to the server-side and the web browser became the thin(ish) client. The web browser was sort of acting as a block device (like the 3270) in the sense that the end-user filled data into fields and then sent the whole thing at once by hitting some button.
With Web 2.0, the client started to put on weight again. Then with mobile apps, the fat client was back, baby! It just keeps cycling.
I wonder when thin clients will come back into vogue again.
I've considered the BLIT to be the platonic ideal, a seamless environment there local or remote behaved the same, looked the same and acted the same - I guess the modern equivalent to that would be Citrix applications - but thats still not as seamless.
The IBM 3270 display family was amazing for its time - a character-oriented, block-mode terminal that supported light pens and APL keyboards in the '70s, as well as color graphics and a plasma display that supported four 80x24 logical screens in the early 80's. https://en.wikipedia.org/wiki/IBM_3270
Despite all the years using their services I had no idea RS has a tech blog!
Reminder that the X11 based x3270 client can be used to communicate with mainframes, including the "Hercules" IBM mainframe emulator that you can run on Linux/Windows/MacOS .
The terminal client program named "x3270 emulator"?
I used to use 3270-based stuff at IBM back in the mid-2000s, when I did tech support for their EPOS systems.
They had some hyper janky Windows XP Citrix client that ran 3270 terminals that kind of half-worked on some server somewhere, that then talked to the Big Iron. When it didn't work (it frequently didn't) it meant we got a lot of coffee breaks, so not the worst in the world.