This was before the days of computers or even electronic calculators.

The 4004 powered one of the first portable electronic calculators.

Others, like the electronic calculator, most of the time require batteries.

With the advent of electronic calculators and personal computers, this is no longer a problem.

Instead, he returned with the new idea to produce electronic calculators, which were just coming on the market.

This technology was to provide a stepping stone to the development of electronic calculators.

It's a good thing I bought one of those new electronic calculators.

That is compatible with the use of simple mechanical or electronic calculators.

Someone saw the situation clearly and set a new pattern in the biggest of the surviving electronic calculators.

How could he justify his fuss about the electronic calculator?