HP-41CV programmable calculator used in the NASA Shuttle Mission Simulator, manufactured in 1983. It has velcro to hold it in the carrying case. From the <a href="https://en.wikipedia.org/wiki/Ladd_Observatory" class="extiw" title="w:Ladd Observatory">Ladd Observatory</a> history of science collection.
<bdi><a href="https://en.wikipedia.org/wiki/en:Ladd_Observatory" class="extiw" title="w:en:Ladd Observatory"><span title="astronomical observatory at Brown University">Ladd Observatory</span></a>
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CC BY-SA 3.0
<span class="int-own-work" lang="en">Own work</span>