索引順次アクセス方式(A technique for indexing database records that allows sequential or random access of records. When records are accessed sequentially they are accessed in the order in which they were entered in the database, and when records are accessed randomly, the records are accessed through an index)
仮想記憶通信アクセス方式(A set of IBM mainframe programs that control communications between a mainframe application and the terminals and computers that connect to the mainframe)