9 BLANK COMPUTER MAGNETIC STORAGE MEDIA; IN THE FORM OF FLOPPY DISKS AND TAPES; COMPUTER TAPE EVALUATION AND CLEANING APPARATUS, NAMELY, ELECTRONIC MOTORIZED PROGRAMMABLE MICRO-PROCESSOR-CONTROLLED APPARATUS FOR REMOVING DEBRIS FROM TAPE, OPTICALLY SCANNING TAPE TO LOCATE, COUNT AND/OR POSITION PHYSICAL DEFECTS FOR INSPECTION, SENSING BEGINNING-OF-TAPE AND END-OF-TAPE MARKERS AND PROPERLY POSITIONING TAPE TO FACILITATE ADDITION OF MISSING MARKERS, MEASURING AND INDICATING TAPE LEADER LENGTH, CALIBRATING CLIPPING LEVELS OF TAPE AND DETECTING AND INDICATING TAPE TRACK ERRORS; AND BRIEFCASES SPECIFICALLY DESIGNED TO HOLD COMPUTER TAPE