In high school in the early 80s I thought I was clever to use an HP41cv to cheat (it was a very expensive calculator but an accessible first programmable computer). It had 2KB memory and ascii capability. Problem was the data entrymethod was so cumbersome that by the time you had entered the stuff you already remembered it. So it was a net zero gain.

At the time though calculators with memory and text were nearly unheard of, so teachers did not even question why there was one on your desk during a french or history exam.