Newsday Photo / Jean Chung - Arvind Borde holds a portable PC from the days of data past: Radio Shack's pioneering laptop of the 1980s.

Luckily for Borde, he knows just where that land is located. Not only does he have its address - the Technology Center on the campus of Southampton College - he is, in a way, a lord of that land. The professor of mathematics and computers is assembling a "History of Computers" exhibit displaying outmoded retro retirees with stories of the folks who were so devoted to them a long, long, long time ago: the 1970s.