noun
reading; readout
Computing term for the action or result of reading data from a device or memory.
センサーの読み出し値を記録する。
Record the sensor readout value.
メモリからの読み出し速度が遅い。
The read speed from memory is slow.
書き込み is the opposite operation: writing data to a device or memory.
Compound of 読み (yomi, 'reading') + 出し (dashi, 'taking out'). The kanji 読出し is a common abbreviation in technical writing.