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And with C/64 there as also some business application (Geos, VisiCalc...).

The 8BitGuy noted usually business computers have 80-columns, whereas "home" compueters 40-colums.

Neverless C/64 could run a small database for a 'VHS Store' without troubles (I made it in basic... :)

The 40 columns limit derives ultimately from most video output in home computers being low-quality RF to a TV screen. You can try to output 80-column text to a TV, but you'll get tons of arfifacts that make it barely usable. Especially if you also insist on color output.

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