16 Printed matter and printed publications, namely, user manuals and guides in the field of computer security and networking, firewalls, content filtering, access control, bandwidth management, virtual private networking (VPN), e-mail servers, anti-virus, and spam filtering; sales literature, namely, brochures and data sheets in the field of computer security and networking, firewalls, content filtering, access control, bandwidth management, virtual private networking (VPN), e-mail servers, anti-virus, and spam filtering; printed marketing materials, namely, case studies and white papers in the field of computer security and networking, firewalls, content filtering, access control, bandwidth management, virtual private networking (VPN), e-mail servers, anti-virus, and spam filtering and printed instructional and teaching materials in the field of computer security and networking, firewalls, content filtering, access control, bandwidth management, virtual private networking (VPN), e-mail servers, anti-virus