Personal computers; industrial personal computers; computer monitors; computer mouse; computer interface boards; computer fax modem cards; blank floppy discs for computers; computer main boards; computer printers; microcomputers; bar code readers; electric switches; CD-ROM drivers; random access memory; pen scanners; optical character recognition; gateways; Internet Protocol phones; local area network phones; Internet Protocol private branch exchange; cable modems; computer operating programs; computer utility programs; computer software for use as a gatekeeper; computer software for use in database management and for data printing in the field of analogue private branch exchange; computer software to automate data warehousing; computer software for use in customer relationship management; computer software and computer programs for interactive voice response, fax on demand, automatic call distribution, and for use as a call manager in the field of computer telephony integration system