DPC-100

a symbol of computer-world in the early 80s, "Pocket computer" for iPhone/iPad !

DPC-100 reference manual
http://www.detune.co.jp/dpc100_reference/index.html
*"DETUNE" on DPC-100's upper-left links it.

-many mathematical functions support
-direct mathematical formula entry
-BASIC programming
-load/save and exchange user programs
-good old days "Pocket computer" traditional design