This is the TI-2500 Datamath, one of the first electronic calculators. It looks like it inspired a certain Engineer's PDA : r/tf2
Calculators
calculadora datamath ti-2500 - Buy Antique calculators on todocoleccion
TI-2500B / Datamath Computer & SPmodules Texas Instruments
TEXAS INSTRUMENTS TI-2500 DATAMATH Electronic Calculator Made in Italy
TEXAS INSTRUMENTS TI-2500 DATAMATH Electronic Calculator Made in Italy
DATAMATH
Texas Instruments TI 2500 Datamath 1973
DataMath - DataPool
Texas Instruments Datamath 2500 calculator nameplate by Brad Grier, Download free STL model
Powerhouse Collection - 'TI-2500 DataMath' calculator
Putting a LiPo Battery in my TI-2500 Datamath Calculator from 1973
GitHub - dkallen78/datamath: Datamath II calculator from Texas Instruments
TI Datamath 2500 II