STREAMLINED: Sometime in the 1990s, office workers...

STREAMLINED: Sometime in the 1990s, office workers who use personal computers may be trading in their bulky desktop models for portable versions packing as much or more punch. . . . A wave of “notebook” PCs--lightweight models that can fit in a briefcase--is being showcased at the huge Comdex computer trade show (D5) this week in Las Vegas. . . . Irvine-based Toshiba America will get into the act with a new 5.9-pound notebook PC.