Hewlett- Packard announced an <A HREF="http://biz.yahoo.com/bw/990329/ca_hewlett_4.html">upgrade</A> for its HP 620LX and 660LX color palmtop PCs. The upgrade includes productivity applications from HP and an upgrade from Windows=AE CE 2.0 to Windows CE Handheld Professional Edition software. The HP productivity applications provide 64K color and MP3 player support, full backup capabilities, an HP viewer for enhanced viewing of PIM information, and HP quick pad.