CAD data exchange use by design, must be a part of the data exchange system. STEP-NC was designed to carry GD&T and other PMI through CAD and CAM into a CNC. CAD data exchange CAD data exchange is a modality of data exchange used to translate data between different Computer-aided design (CAD) authoring systems or between CAD and other downstream CAx systems. Many companies use different CAD systems internally and exchange CAD data with suppliers, customers and subcontractors. Transfer of data is necessary so that, for example, one organization can be developing a CAD model, while another performs analysis work on the same
Acronym was formed from the Greek words , ', "topmost, extreme" and , ', "name.") For example, the army offense of being "absent without official leave" was abbreviated to "A.W.O.L." in reports, but when pronounced as a word ("awol"), it became an acronym. While initial letters are commonly used to form an acronym, the original definition was "a word made from the initial letters or syllables of other words", for example UNIVAC from UNIVersal Automatic Computer. In English, acronyms "pronounced as words" may be a 20th-century phenomenon. Linguist David Wilton in "Word Myths: Debunking Linguistic Urban Legends" claims that "forming words