Editing APEXC (section)

==The APE(X) C series==
The APE(X)C series included the following machines:
* '''APE(X)C''': Birkbeck College, London, first time operated in May 1952,<ref name=":0" /> ready for use at the end of 1953<ref name=":1" />
* '''APE(N)C''': [[Board of Mathematical Machines]], [[Oslo]] ('N' likely stands for '[[Norway]]'), also known as [[NUSSE]]
* '''APE(H)C''': [[British Tabulating Machine Company]] (It is unclear what 'H' stands for - perhaps '[[Computing-Tabulating-Recording Company#Tabulating Machine Company|Hollerith]]' as the company sold Hollerith [[Unit record equipment]]
* '''APE(R)C''': [[British Rayon Research Association]] ('R' stands for 'Rayon'<ref name="earlybrit" />), ready for use in June 1952<ref name=":1">{{cite book|url=https://archive.org/details/bitsavers_onrASurveyomputers1953_8778395|title=A survey of automatic digital computers|last1=Research|first1=United States Office of Naval|date=1953|publisher=Office of Naval Research, Dept. of the Navy|pages=[https://archive.org/details/bitsavers_onrASurveyomputers1953_8778395/page/n11 4]–5|language=en}}</ref>
* '''UCC''': [[University College, London]] (circa January 1956)<ref name=":2">{{cite journal|title=COMPUTERS, OVERSEAS: 2. Birkbeck College Computer Laboratory (London, England)|journal=Digital Computer Newsletter|date=Jan 1956|volume=8|issue=1|pages=16–17|url=https://apps.dtic.mil/sti/citations/AD0694619|archive-url=https://web.archive.org/web/20190406120028/http://www.dtic.mil/docs/citations/AD0694619|url-status=live|archive-date=April 6, 2019|language=en}}</ref>
* '''MAC''' or '''MAGIC''' ('''Magnetic Automatic Calculator'''): "built by [[Wharf Engineering Laboratories]]" (February 1955)<ref name=":2" />
* The '''HEC''' ('''[[Hollerith Electronic Computer]]'''), built by the British Tabulating Machine Company (later to become [[International Computers and Tabulators]] (ICT), then [[International Computers Limited]] (ICL)), a commercial machine sold in several models and later known as the ICT200 series.  There were likely the derivatives '''HEC 1''', '''HEC 2''', '''HEC 2M''' - M for 'marketable' denoting the machine's orientation toward commercial rather than scientific customers, and '''HEC 4''' (before 1955)

Only one of each of these machines was built, with the exception of HEC (and possibly MAC) which were commercial machines produced in quite large numbers for the time, around 150. They were similar in design, with various small differences, mostly in I/O equipment.  The APEHC was a [[punched card]] machine while the  APEXC, APERC and APENC were [[Teleprinter|teletype]]rs ([[alphanumeric keyboard|keyboard]] and [[Computer printer|printer]], plus [[paper tape]] reader and puncher).  Also, the UCC had 8k words of storage, instead of 1k word for other machines, and the MAC used germanium diodes in replacement of many valves.