COMPUTER PROGRAMS, NAMELY, COMPUTER PROGRAMS ENABLING COMMUNICATION WITH FIELD STAFF, AND COMPUTER PROGRAMS ENABLING AUTOMATIC MESSAGING OF FIELD STAFF, USING COMMUNICATIONS MEANS INCLUDING MOBILE TELEPHONES AND/OR PAGERS; DATA CARRIERS, NAMELY, MAGNETIC TAPES, MAGNETIC DISCS, OPTICAL DISCS AND SOLID-STATE DEVICES, PRE-RECORDED WITH COMPUTER PROGRAMS OF THE TYPES AFORESAID