Actually, there was a DIPP package for many of the DRAMs. It was a
single-in-line-looking version of the DIP, except that all the pins were on
one side and they were staggered in their alignment. These were most often
referred to as ZIP's, though I don't know why. The package was somewhat
popular for about 5 years, after which it fell into disuse.
Dick
ZIP == ZigZag Inline Package