It seems we finally have a positive match for our unidentified calculator. Someone at HP Museum’s forum found these two models, Intermec 9444 and 9445. If you compare these closely to the original shuttle picture, you will notice that key layout and colors match, design matches and you can even almost match the logo.

UPDATE: a close examination of a high-def picture sent by NASA to the HP forum reveals that it clearly is an Intermec 9445.

Intermec 9444 and 9445

Intermec 9444 and 9445

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