Refinery Supply Company Slide Rule
Seeking information about a Refinery’s Pocket Calculator.
“I look forward to hearing anything your knowledgeable AOGHS community can tell me about my rather mysterious AC-ME Pocket Calculator.”
David Rance of Sassenheim, Netherlands, has collected a lot of slide rules — the analog calculating devices that became obsolete when handheld electronic calculators gained widespread use in the early 1970s. Rance and others like him have preserved “pocket calculator” collections around the world. (more…)
