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Developer(s)Digital Equipment Corporation (DEC)
Initial releaseSeptember 1976; 43 years ago (1976-09)
TypeProgramming language

BASIC-11[1][2][3] was a dialect of the basic language for PDP-11 operating systems such as RSX-11, RT-11, TSX and TSX-Plus.[4] It was a classic BASIC in that it used line numbers, supported line number editing, and classic function syntax. It provided extended support for user-defined functions, external sequential disk files, and linking with assembler language modules for device support and operating system interfaces.


  1. ^ Advertisement: Data Entry Software for PDP-11...Written in BASIC-11..., Page 72, Computerworld, 21 February 1977, retrieved 25 February 2018.
  2. ^ Basic-11 documentation, 1. May 2011, David's Blog, This was quite hard to find, so here is a zip file containing some documentation for Basic-11., contains BASIC-11 Language Reference Manual - September 1976
  3. ^ BASIC-11/RT-11 User's Guide Update 1 (1978-03), Company:Digital Equipment Corporation, Part:DEC-11-LIBUA-A-D, Date:1977-09
  4. ^ Basic-11 Tool Gets Update, Computerworld, 27 Jul 1981, Page 54, ...General Systems, Inc. is offering Release 3.0 of its business Basic-11 accounting system,...All programs are written in Basic-11 and will run on any Digital Equipment Corp. PDP-11 running RT-11, TSX or TSX-Plus operating systems...