Editing Write-only memory (joke) (section)

==Signetics==
A "Write-Only Memory" datasheet was created "as a lark"<ref>{{Citation |url = http://www.sigwom.com/?page_id=17 |title = Sigwom |access-date = 2014-12-16 |archive-date = 2016-02-19 |archive-url = https://web.archive.org/web/20160219044114/http://www.sigwom.com/?page_id=17 |url-status = live }}.</ref> by Signetics engineer John G "Jack" Curtis,<ref name = Sigwom>{{Citation |url = http://www.sigwom.com/ |title = Sigwom |access-date = 2014-12-16 |archive-date = 2019-01-23 |archive-url = https://web.archive.org/web/20190123035308/http://www.sigwom.com/ |url-status = live }}.</ref> inspired by a fictitious and humorous vacuum tube datasheet<ref>''Wemac 1Z2Z Slightly Tentative Data'', Eitel-McCullough, Inc. 1953, itself a successor to ''Umac 606 Infernal Anode Phantasatron Data Sheet'', Eitel-McCullough, Inc., 1950, both referenced on [http://www.sigwom.com/?p=186 "Wemac 1Z2Z Data Sheet", sigwom.com] {{Webarchive|url=https://web.archive.org/web/20160223223041/http://www.sigwom.com/?p=186 |date=2016-02-23 }}. Note the reference to 'encabulitzation' in the 1Z2Z data sheet.</ref> from the 1940s. Considered "an icebreaker", it was deliberately included in the Signetics catalog.<ref name = Sigwom />

Roy L Twitty, a Signetics PR representative, released a tongue-in-cheek press release touting WOM on April 1, 1973.<ref>{{Citation |url = http://www.ariplex.com/tina/tsignet1.htm |editor = Tina |title = Funny pages |contribution = The original papers on the invention of the best electro… |access-date = 2014-12-20 |archive-date = 2019-09-05 |archive-url = https://web.archive.org/web/20190905130517/http://www.ariplex.com/tina/tsignet1.htm |url-status = live }}</ref> Instead of the more conventional characteristic curves, the 25120 "fully encoded, 9046×N, Random Access, write-only-memory" data sheet included meaningless diagrams of "bit capacity vs. Temp.", "Iff vs. Vff", "Number of pins remaining vs. number of socket insertions", and "[[Acceptable quality limit|AQL]] vs. selling price". The fictional device required a 6.3&nbsp;V[[Alternating current|<sub>AC</sub>]] V<sub>ff</sub> ([[vacuum tube]] filament) supply, a +10&nbsp;V<sub>cc</sub> (double the V<sub>cc</sub> of standard [[Transistor-transistor logic|TTL]] logic of the day), and V<sub>dd</sub> of 0±2% volt (i.e. [[Ground (electricity)|ground]]). It was specified to run between 0 and −70&nbsp;°C.<ref>{{cite web |publisher=Signetics |url=http://www.national.com/rap/files/datasheet.pdf |title=Signetics 25120 Fully Encoded, 9046xN, Random Access Write-Only-Memory |first=John G ‘Jack’ |last=Curtis |year=1972 |accessdate=2012-03-16 |type=photocopy |url-status=dead |archiveurl=https://web.archive.org/web/20120316141638/http://www.national.com/rap/files/datasheet.pdf |archivedate=March 16, 2012 }}.</ref>