Good tiny device for storing/summing up a few lists of numbers throughout the day?

[Joe Horn]

At the danger of involving HP calculators in this "Not remotely HP Calculators" forum, I'm sure that the attached PDF file will bring a smile to Dave Britten. It's the homework assignment for April 3, 1998, from the HP 48 Programming Class that was held at EduCALC every Friday for many years by Richard Nelson and Yours Truly. Here's the synopsis of this particular assignment:

"Write a [HP 48] program that adds the current date and time (to nearest second) to a list called ‘HIST’. This program may used to record the occurrence of an event such as, having a meal, taking medicine, doing a specific exercise, completing a task, etc."

Sound familiar? There is nothing new under the sun. This assignment's invisible background was the fact that Richard Nelson used his HP 48 for many years to log and track everything pertaining to diabetes. His doctor was always amazed at his thermal printouts; everything he needed was there! Later, the 50g of course became the better choice for medical data due to its SD slot.