olemus
Wiktionary:
1. a mechanical device intended to make a task easier
2. any piece of equipment used in a profession, e.g. a craftman's tools
3. something to perform an operation; an instrument; a means
4. (computing) a piece of software used to develop software or hardware, or to perform low-level operations
5. a person or group which is used or controlled, usually unwittingly, by another person or group

Merriam-Webster:
1a: a handheld device that aids in accomplishing a task
2a: something (such as an instrument or apparatus) used in performing an operation or necessary in the practice of a vocation or profession
// a scholar's books are his tools
2b: an element of a computer program (such as a graphics application) that activates and controls a particular function
// a drawing tool
2c: a means to an end
// a book's cover can be a marketing tool
3a: one who is used or manipulated by another
// And then there was former trainer Pfeil, viewed as another tool of management for his gruff ways.

näiteid
ISO/IEC 27041:
protsessis kasutatav tarkvara, riistvara või püsivara
= software, hardware, or firmware used in a process

ülevaateid
https://en.wikipedia.org/wiki/Tool
https://en.wikipedia.org/wiki/Tool_steel
https://en.wikipedia.org/wiki/Programming_tool

vt ka
- kaughaldusriist
- riistakast
- riistakomplekt