asynchronous transfer mode; ATM
Technical term in telecommunications for a network protocol that transmits data in fixed-size cells.
Asynchronous Transfer Mode was once used in wide area networks.
ATM is the English abbreviation; 非同期転送モード is the full Japanese term. In Japanese, ATM can also refer to automated teller machines, so context is important.
A direct translation of the English term 'asynchronous transfer mode', combining 非同期 (asynchronous), 転送 (transfer), and モード (mode).