| Subject | English | Japanese |
| comp. | n basic measurement unit | 基本測定単位 |
| comp., MS | basic transmission unit | 基本伝送単位 (A standard unit of information transmitted over an SNA network. A basic transmission unit (BTU) consists of the transmission header (TH), the request/response header (RH), and the request/response unit (RU). The maximum size of the BTU is controlled in VTAM by the MAXDATA= parameter and in Host Integration Server by the Max BTU Length parameter) |
| comp., MS | begin basic information unit indicator | 基本情報単位開始標識 (Bit 5 of Flag 2 of a Status-Control message. BBIUI is set on a Status-Control message corresponding to an outbound SNA request with BBIU (begin basic information unit). It is supplied solely for the use of SNA server components. Your application should not attempt to use this flag) |