Conversation:

" which a raster-scan TV monitor display[foot note 2]"

Presumably "...with.." ?

Excellent article, though - a credit to the one-third bat.

Excellent entry - I had no idea there was so much behind Tetris!

thanks you guys! makes you itch to play tetris now, doesn't it? surrendermonkey, thanks for spotting the typo. i'll see if i can get an editor to rectify the mistake...