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The nice thing about line numbers is that you didn't have to learn a different code editor for different computer brands. I could walk up to any computer that had BASIC in a department store, and program up my favorite childish prank on every brand:

         10 PRINT "This computer is overheated."
         20 PRINT "WARNING: Computer about to EXPLODE!..."
         30 GO TO 10
         RUN

Newbies walking up saw the active screen, got wide-eyed and walked away quickly. One even called security, as I watched from a distance. Good times!