TTY stands for teletypewriter and it is the term preferred by the Deaf Community. You may also see the terms TT (Text Telephone) or TDD (Telecommunication Device for the Deaf); they all refer to the same equipment.
Customer premises equipment (CPE) is telephone or other service provider equipment that is located on the customer's premises (physical location) rather than on the provider's premises or in between. Telephone handsets, cable TV set-top boxes, and Digital Subscriber Line routers are examples. Historically, this term referred to equipment placed at the customer's end of the telephone line and usually owned by the telephone company. Today, almost any end-user equipment can be called customer premise equipment and it can be owned by the customer or by the provider.
Common Platform Enumeration (CPE) with Nessus. By Paul Asadoorian on May 24th, 2010. You may know the folks over at MITRE for their work on the CVE (Common Vulnerabilities & Exposures). Standards such as CVE help us track and document thousands of vulnerabilities released each year. Along the same lines, a new project from MITRE called CPE (Common Platform Enumeration) provides the public with a standard method to enumerate software: CPE is a structured naming scheme for information technology systems, platforms, and packages.