Editing RT-11 (section)

===Software===
RT-11 was distributed with utilities for performing many actions. The utilities ''[[dir (command)|DIR]]'', ''DUP'', ''[[Peripheral Interchange Program|PIP]]'' and ''[[format (command)|FORMAT]]'' were for managing disk volumes. [[TECO (text editor)|TECO]], ''EDIT'', and the [[visual editor]]s ''KED'' (for the DEC [[VT100]]) and ''K52'' (for the DEC [[VT52]]) were used to create and edit source and data files. ''MACRO'', ''LINK'', and ''LIBR'' were for building executables. [[Octal Debugging Technique|ODT]], ''VDT'' and the SD device were used to debug programs. DEC's version of [[Runoff (program)|Runoff]]<ref>{{cite news |newspaper=[[Computerworld]]
 |title=Runoff polishes text on RSTS/E, RT-11 |date=September 25, 1978 |page=35}}</ref> was for producing documents. Finally, VTCOM was used to connect with and use (or transfer files to and from) another computer system over the phone via a modem.

The system was complete enough to handle many modern personal computing tasks. Productivity software such as LEX-11, a word processing package, and a spreadsheet from Saturn Software, used under other PDP-11 operating systems, also ran on RT-11.<ref>{{cite news
 |newspaper=[[Computerworld]] |title=LEX-11 on all DEC operating systems
 |date=April 20, 1981 |page=59}}</ref> Large amounts of free, user-contributed software for RT-11 were available from the [[DECUS|Digital Equipment Computer Users Society (DECUS)]] including an implementation of [[C (programming language)|C]]. Although the tools to develop and debug assembly-language programs were provided, other languages including C, [[Fortran]], [[Pascal (programming language)|Pascal]],<ref>{{cite news |newspaper=[[Computerworld]]
|title=PASCAL on RT-11 |date=March 10, 1980 |page=102}}</ref> and several versions of [[BASIC]] were available from DEC as "layered products" at extra cost. Versions of these and other programming languages were also available from other, third-party, sources. It is even possible to network RT-11 machines using [[DECNET]], the [[Internet protocol suite|Internet]] and protocols developed by other, third-party sources.