interactive information storage, search and retrieval services in the medical field; leasing access time to interactive computer and CD-ROM databases in the field of health care; leasing access time to computer databases which provide access to and retrieval of up-to-date patient specific informtion, patient specific medical history information, physician treatment information, laboratory information, hospitalization information, pharmaceutical and prescription information, treatment decision support information, formulary information, drug information, insurance information, health care provider information, information respecting pharmaceutical and insurance transactions and information respecting pharmaceutical and prescription sales; leasing computer access time to catalog databases; leasing computer access time to databases in the field of recruitment, career and/or employment in the field of health care; CD-ROM database updating services; leasing computer access time to interactive market information databases; leasing computer access time to interactive database information services, namely online health care seminars; interactive on-line shopping services; and two-way message communication services, namely electronic mail services and prescription transmission services