Editing FOCAL (programming language) (section)

==References==
{{Reflist}}

===Bibliography===
* {{cite book
 |title=FOCAL Programming Manual 
 |publisher=Digital Equipment Corporation 
 |date=1968 
 |url=http://www.bitsavers.org/www.computer.museum.uq.edu.au/pdf/DEC-08-AJAB-D%20PDP-8-I%20FOCAL%20Programming%20Manual.pdf 
|ref=CITEREFManual1968
}}
* {{cite web
 |url=https://www.gamedeveloper.com/business/a-basic-history-of-basic-on-its-50th-birthday
 |title=A basic history of BASIC on its 50th birthday
 |website=Gamasutra
 |date=1 May 2014
 |first=John |last=Szczepaniak
 }}
* {{cite interview
 |first=Kevin |last=Savetz
 |date=April 2013
 |title=Dave Ahl and Betsy Ahl
 |url=https://computingpioneers.com/index.php?title=Dave_Ahl_and_Betsy_Ahl
 }}