ELECTRICAL AND SCIENTIFIC MEASURING DEVICES-NAMELY, ELECTRO-MECHANICAL, ELECTRONIC, AND PHOTO-OPTICAL DEVICES USED IN THE CREDIT CARD INDUSTRY FOR COUNTING CREDIT CARDS, VERIFYING AND IDENTIFYING INFORMATION ON CREDIT CARDS, CARRIERS AND MAILERS, INSERTING OF CREDIT CARDS IN CARRIERS, INSERTING OF MAILERS AND/OR COMPLETED CARRIERS IN ENVELOPES, AND DETECTING CONTENTS OF SEALED ENVELOPES