Lotus 1-2-3 For Linux
> It turns out that the BBS also had a warez copy of Lotus 1-2-3 for UNIX. This was widely thought to be lost – I’m told it couldn’t compete with a more popular UNIX office suite called SCO Professional, so there were not many copies sold.<p>I wonder if anyone still has a copy of Lotus 1-2-3/M? It was the port to the IBM mainframe operating systems MVS (nowadays known as z/OS) and VM/CMS (nowadays z/VM). [0] Not that I ever used it or saw it, but just I have become fascinated with it from reading descriptions of it. From what I understand, it is more different from 1-2-3 for DOS than the Unix or VMS ports were; the Unix and VMS ports work with character mode terminals (such as VT100 compatibles), which while rather different from the terminal model used on MS-DOS or text mode OS/2 (direct memory access to the  screen buffer), nonetheless are close enough that the bridge can be gapped–which (on Unix) is classically the job of the curses library (and its various descendants). By contrast, 1-2-3/M was written to work with the block mode 3270 terminals commonly used on IBM mainframes, which send to/from the terminal whole screenfuls of data at a time, rather than individual characters (somewhat similar, in principle, to classic HTML forms). This forced greater changes in the UI compared to the other ports, because a lot of things which are easy to implement with character mode terminals are essentially impossible in 3270.<p>[0] <a href="https://www.ibm.com/common/ssi/ShowDoc.wss?docURL=/common/ssi/rep_ca/4/897/ENUS290-104/index.html&lang=en&request_locale=en" rel="nofollow">https://www.ibm.com/common/ssi/ShowDoc.wss?docURL=/common/ss...</a>