The ITA's most important event was its annual trombone workshop. The first three workshops (held in the summers of 1971, 1972 and 1973) were billed as the National Trombone Workshop (NTW). The International Trombone Association was formed at the 2nd workshop in 1972. Beginning with the 1974 workshop the name was changed to the International Trombone Workshop (ITW). In 1999 the name was changed again to the International Trombone Festival (ITF), but the numeration continued, so it was billed as the 28th ITF. The documents in this series relate to the planning, logistics and follow-up of events sponsored or supported by the Trombone Association. They can include letters of invitation to potential faculty members and clinicians, negotiations related to compensation, what music to play, presentations and lectures, programs (both draft and final), publicity, newspaper reporting, evaluations and thank you notes and other materials. Folders containing documents generated after the summer workshops contain both post-workshop materials and planning for the next year's workshop. Most years also have a separate logistics folder that contains documentation related to internal accounting of the host organization such as room set-ups, equipment needed for various presentations, hours of breakfast, roommate details, and other routine housekeeping materials. Photographs and biographies of presenters, both individuals and groups, were filed separately in Series 13 - Photographs. Any other audio/visual materials related to events are filed separately.Other events, such as The Eastern Trombone Workshop, the Boston Sackbut Week, etc. are filed alphabetically after the workshop records.