Editing OS/2 (section)

====OS/2 1.0 (1987){{anchor|1.0}}====
OS/2's release was long delayed. It was widely believed that all IBM programmers used [[assembly language]], and a rumor said that the delay was because they had to learn [[C (language)|C]].<ref name="vose198807">{{Cite magazine |last=Vose |first=G. Michael |date=July 1988 |title=Reader's Guide to OS/2 |url=https://archive.org/details/byte-1988-07_202104/page/51/mode/1up?view=theater |access-date=2025-04-12 |department=Book Reviews |magazine=[[Byte (magazine)|Byte]] |pages=51-54}}</ref> OS/2 1.0 was announced in April 1987 and released in December. The original release only ran in [[text mode]], and a GUI was introduced with OS/2 1.1 about a year later. OS/2 features an [[Application programming interface|API]] for controlling the [[display device|video display]] (VIO) and handling [[computer keyboard|keyboard]] and mouse events so that programmers writing for [[protected mode]] need not call the [[BIOS]] or access hardware directly. Other development tools included a subset of the video and keyboard APIs as linkable libraries so that family mode programs are able to run under MS-DOS,{{citation needed|date=April 2019}} and, in the OS/2 Extended Edition v1.0, a database engine called Database Manager or DBM (this was related to [[DB2]], and should not be confused with the [[DBM (computing)|DBM]] family of database engines for Unix and [[Unix-like]] operating systems).<ref>{{cite web|url=http://users.informatik.uni-halle.de/~brass/zert08/c1_produ.pdf|title=DBA Certification Course (Summer 2008) Chapter 1: DB2 Products and Tools|website=Users.informatik.uni-halle.de|access-date=2 April 2019}}</ref> A task-switcher named Program Selector was available through the Ctrl-Esc [[hotkey]] combination, allowing the user to select among multitasked text-mode sessions (or screen groups; each can run multiple programs).<ref>{{cite web|title=OS/2 1.0|author=Michal Necasek|work=The History of OS/2|date=2001-07-16|url=http://pages.prodigy.net/michaln/history/os210/index.html|url-status=dead|archive-url=https://web.archive.org/web/20100811211529/http://pages.prodigy.net/michaln/history/os210/index.html|archive-date=2010-08-11}}</ref>

Communications and database-oriented extensions were delivered in 1988, as part of OS/2 1.0 Extended Edition: [[Systems Network Architecture|SNA]], [[X.25]]/[[Advanced Program-to-Program Communication|APPC]]/LU 6.2, [[LAN Manager]], [[Query Management Facility|Query Manager]], SQL.

[[File:Os2-1.1-desktop.png|thumb|right|OS/2 1.1 was the first version to feature the Presentation Manager GUI.]]