COMPUTER MOUSE; COMPUTER PERIPHERALS, NAMELY, COMPUTER ROLLERBALL; AND COMPUTER PERIPHERALS, NAMELY, BUTTON-ACTIVATED INPUT DEVICE THAT WHEN ROLLED ALONG A FLAT SURFACE DIRECTS AN INDICATOR TO MOVE CORRESPONDINGLY ABOUT A COMPUTER SCREEN, ALLOWING THE OPERATOR TO MOVE THE INDICATOR FREELY, AS TO SELECT OPERATIONS OR MANIPULATIVE TEXT OR GRAPHICS