Hewlett-Packard

HP 11C, (and another one)

HP 21

HP 27

HP 32e

HP 33c, (and another one)

HP 37e

HP 38c

HP 67 (Derek gave me this one. Thanks Derek!)

Texas Instruments

TI 1250

TI 2500 DataMath

TI 2550 III

TI SR 10

TI 1200

TI 30 Everyone has one of these (they're very common). I even have three of them.

TI 55

TI Programmable 58

A TI MBA

Sharp

Sharp 8131 A guy named Fred gave this one to me.

Sharp EL 808

Sharp EL 5100S(Derek gave me this one too. Thanks again! Lunch on me?)

Rockwell

Rockwell 18R Bought this one at a flea market in West Virginia. While waiting in line to pay I heard two guys discussing the best way to skin a ground-hog before you eat it. Ahhhh...West Virginia!

Other

Craig (never heard of this company)

Monroe 98(you still see a lot of this company's desktop calculators)

Commodore 887D

The Director 2 (I don't know what company made this one. It's pretty big too. About 8" on the long side).

Lloyd Acclamatic 30

Lloyd Acclamatic 70

Brother 408