I made a kick ass database system on the Spectrum 48K. (Well at the time I thought it was). Security was tight. If you typed in the wrong password twice, the

I made a kick ass database system on the Spectrum 48K. (Well at the time I thought it was). Security was tight. If you typed in the wrong password twice, the system resets and you must load it in from cassette tape again. To use it you first had to load the database system from cassette. Then form a different cassette load the data. Then the password. Made brute force attacks time consuming. I thought that was highly clever back then. When you added, edited, changed, removed etc the changed records only existed in ram until they were saved to tape again. It did not sell well. At all. Not even 1.