An
oddity from 1978, the PP3 - an adaptation of the
earlier Cambridge calculator - owed its unusual
"pregnant" look to the lid of the
battery compartment. It highlighted a key
weakness of Sinclair's calculators, namely their
reliance on large, heavy batteries which were
drained rapidly by the LED displays.
An
oddity from 1978, the PP3 - an adaptation of the
earlier Cambridge calculator - owed its unusual
"pregnant" look to the lid of the
battery compartment. It highlighted a key
weakness of Sinclair's calculators, namely their
reliance on large, heavy batteries which were
drained rapidly by the LED displays.