Computer software for use in personnel management, payroll preparation, holiday and leave administration, personnel assessment and evaluation, personnel recruitment, inventory management, file management, enterprise resource planning, cost price analysis, dissemination of advertising matter to customers and potential customers; marketing research, bill posting, book-keeping, tax preparation, accounting management; facilities management software, namely, software to control building environmental, access and security systems; computer hardware, namely, magnetic encoded card readers, magnetic coded card readers, bar code readers; chronographs for use as specialized time recording apparatuses; watchman's time recorders, namely, a device for recording the activities of security guards to insure that the security guard arrives at scheduled checkpoints; access control and alarm monitoring systems, personal security alarms; motion sensitive security lights; automated security gates; fingerprint readers; computerized time clock with fingerprint recognition; computer peripherals; blank computer discs; blank floppy computer discs; blank hard computer discs; blank optical discs; hard discs for computers; computer, video, audio and digital compact discs; computer, video, audio and digital laser discs; audio cassette recorders; audio tape recorders; digital audio tape recorders; digital video recorders; event recorders; programmable digital television recorders; video cassette recorders; video tape recorders; audio amplifiers; audio mixers; audio speaker enclosures; audio speakers; digital audio players; digital audio tape players; electric audio playback units with lights and speakers; audio and video receivers; video cameras; video monitors; video processors