Editing FOCAL (programming language) (section)

== Versions and spinoffs ==
The Coca-Cola Corporation used a customized version of FOCAL called COKE.{{Citation needed|date=October 2020}}

FOCAL was later implemented on the PDP-7, PDP-9, PDP-10, PDP-11, PDP-12, PDP-5 and LINC-8.

The FOCAL manual showed how to add commands to the FOCAL parser, so many sites added specialized commands for operating custom hardware.

The [[DECUS|Digital Equipment Computer Users' Society]] collected many patches and enhancements for FOCAL. There were even major enhanced offshoots of FOCAL, such as FOCAL-W, which added many features, including better mass storage file I/O and even virtual variable memory.

In the mid-1970s DELTA was a more sophisticated version of FOCAL. Program line numbers went from 00 to 99 "parts" and 000000 to 999999 "steps" executed in alphanumeric order. DELTA had some specialized commands for the Tektronix 4010/14 display scope.

In [[Russia]], it saw use as late as the early 1990s in mass-produced home computers of the [[Electronika BK]] series.

[[Microsoft]] sold a version of FOCAL supplied on paper-tape.<ref>{{Cite web |title=What happened to the Microsoft FOCAL interpreter? | website=[[YouTube]] |url=https://www.youtube.com/watch?v=2BV9kdfKeqo |access-date=2022-09-18}}</ref> According to Raymond Chen, the master tape is missing and FOCAL is no longer available.