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The term was in use in 1970 to refer to the "tuning" of ferrite core memory stacks on IBM systems.{{fact|date=June 2017}}
<!-- The following sentence has 2 different articles of the same name. Please leave both. They are not the same article, and may not both be readable to everyone due to IEEE restrictions -->
Baker and de Vos write that origin was in the early 1970s, when test results were first printed on simple printers (such as [[teletype]]s) connected to test computers.<!-- Yes, two different articles of the same name. --><ref>[http://doi.ieeecomputersociety.org/10.1109/TEST.1996.557162 Shmoo Plotting: The Black Art of IC Testing], Keith Baker and Jos van Beers, [[IEEE]] International Test Conference, 1996 (''shorter, two page conference paper'').</ref><ref>[http://ieeexplore.ieee.org/document/606005/ Shmoo Plotting: The Black Art of IC Testing], Keith Baker and Jos van Beers, [[IEEE]] Design & Test of Computers, Volume 14, No. 3 (1997), p.90-97.</ref>
== Etymology ==
[[File:Lifeshmoo.jpg|thumb|right|100 px]]
The plot takes its name from the [[Shmoo]], a fictional species created by [[Al Capp]] in the cartoon [[Li'l Abner]]. These small, blob-like creatures have shapes similar to the "working" volumes that would be enclosed by shmoo plots drawn against three independent variables (such as voltage, temperature, and response speed).
Semiconductor chips do not usually exhibit "shmoo" shape plots.{{fact|date=June 2017}} Historically, testing of magnetic core memory arrays produced the "shmoo" shape and the term continued into the semiconductor era. == Description==
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==References==
{{reflist}}
[[Category:Plots (graphics)]]
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