asynchronous communication
Technical term used in computing and telecommunications for communication where data is transmitted intermittently rather than in a steady stream, or where sender and receiver do not need to be synchronized in time.
Email is an example of asynchronous communication.
Synchronous communication; data is sent in a continuous stream with timing coordination between sender and receiver.
asynchronous communications adapter
Compound of 非 (hi, 'non-'), 同期 (dōki, 'synchronization'), and 通信 (tsūshin, 'communication').