HP-01 LED calculator watch operation and how to
In this section you will learn what the HP-01 LED watch can do and for example how to calculate the running costs of a telephone
call in real time with the HP01. In former times, when a telephone call to overseas was much more expensive than nowadays, this
was an important feature.
Besides the HP-01 can calculate for example which day of the week is the 10th of October 2022 or which exact date is in
894 days in the future.