Yes! old memories .. I remember my casio fx501P where I start writing my first software and the TI58c of my nearby mate, much powerful but with a poor battery,

Yes! old memories .. I remember my casio fx501P where I start writing my first software and the TI58c of my nearby mate, much powerful but with a poor battery, havvy, and almost unusless for long time calculactions, my little casio always was winning against the texas!