noun
input/output; I/O
Computing term for data transfer between a system and external devices or networks.
このプログラムは入出力の処理が遅い。
This program has slow input/output processing.
入出力装置を接続してください。
Please connect the input/output device.
Means 'output' only, while 入出力 covers both input and output.
Compound of 入 (input) + 出力 (output), a straightforward technical term.