Hewlett Packard HP 11C Calculator, with new batteries, made in USA, works great | nusantaran
HP-11C scientific calculator
HP-11C - Amazing Battery Life
Used To Have / Now Have - Off Topic!!! - Mystery Science Discourse 3000
HP 11C Scientific Calculator
matt blaze on Twitter: "Found my trusty old HP15c and HP16c calculators, which I thought were long lost, the other day. Replaced batteries and they're both good as new. I'm unreasonably pleased