Mag card TIs + Continuous Memory

[rprosperi]

The SR-52 was about 2 (important for CMOS) years earlier, while the 59 had mag cards so it was less essential.

The 58, which had no card reader, added a "C" almost 3 years after the 25C, and in fact after the 25C was discontinued.

For consumer products, pretty safe to say HP mastered CMOS productiom well ahead of TI.