Before Excel and Google Sheets, there was VisiCalc on the Apple II.
The TRS-80 used a Z-80 CPU, as opposed to the Apple II and Atari 800’s 6502. It might not have been a straightforward port.
VisiCalc: The first 'killer app'
The TRS-80 used a Z-80 CPU, as opposed to the Apple II and Atari 800’s 6502. It might not have been a straightforward port.