Technician: In public relations roles theory, a technician is a master of communications channels or techniques, but not someone who contributes to the development of PR strategy (see PR manager).
Tendering: The process of shopping around to achieve best price on goods or services. Often a requirement within the public sector.
Testimonial: An endorsement by a third party often used in promotional materials.
Trade journal: A specialist title focusing on a specific trade or profession, as distinct from general consumer (ie end user) audiences. Often an important component of B2B PR campaigns.