And you’re right.. The first computer wasn’t ‘handheld’.
It was called the Eniac, designed in 1943 and went into operation in 1046.
“ENIAC contained 17,468 vacuum tubes, 7,200 crystal diodes, 1,500 relays, 70,000 resistors, 10,000 capacitors and around 5 million hand-soldered joints. It weighed more than 30 short tons (27 t), was roughly 8 by 3 by 100 feet (2.4 m × 0.9 m × 30 m), took up 1800 square feet (167 m2), and consumed 150 kW of power[”
You would need an awful big ‘hand’ to hold it! :0)
oops..
Should read ‘1946’... :)