This is a student donation.
The Craigslist ad listed it for 150.
You can decipher what the number is for most numbers, although an 8 will look the same as.
Friden Model D8 Electro-Mechanical Calculator, Serial.The Model 310 was identical except it used three AA disposable batteries.In 1986 Sperry merged with Burroughs, which also made adding machines at the turn of the century, to become the present day company, Unisys.Purchased on on eBay with 24 other calculators and organizers for.99 with.70 shipping.It is in good cosmetic condition except for what looks to be some melted plastic on the back.It was back then, having beta tested XP for several months and using the XP beta as the demo platform at Macworld Expo New York 2001, that I felt compelled to write this XP tutorial urging people to upgrade from DOS-based Windows releases (Win95/98/Me).It originally sold for 395, over 1,950 in today's dollars!The crystal on substrate LCD with black letters against a silver background is lit by a incadescent blub to aid visiblibilty.
Scientific calculators like the TI 50 and HP 35 quickly displaced slide rules in the early 1970s just when I was entering high school.
TI 30, red LED scientific calculator.
6cm x 9cm x 3cm) six digit LED display calculator with no floating decimal.Jim Askew's Slide Rule Operations.There is another upgrade glitch, in that Windows Vista did not come in a "Professional Edition" as Windows XP and Windows 7 both.I had to replace the original batteries.Works although the keys have a tendency to repeat unless you press them lightly.Calculator Collection lists the similar but more modern looking 1949 Friden DW-8.Additional information at datmath.Intro (Top) TI LED TI LCD Sharp Casio HP Canon Commodore Sanyo Rockwell Bowmar Panasonic Royal Other Mechanical Mechanical Devices Comptometer Model J, very cool machine purchased at a San Carlos (San group policy time sync server 2008 r2 Diego) garage sale on April 23, 2005 for.Franklin is historically significant in personal computer history having made a line of Apple II and PC clones.