body part; main unit
Computing term referring to the main body or physical unit of a device, as opposed to peripherals or attachments.
プリンターの本体部はかなり重い。
The main body of the printer is quite heavy.
このカメラの本体部だけでも防水機能がある。
Even just the body of this camera is waterproof.
body part encryption indication
Compound of 本体 (main body) + 部 (part, section). The exact historical derivation is uncertain, but the term is used in modern technical contexts.