olemus
(1a) füüsiline tööriistade kast
Wiktionary:
a physical storage case for tools
https://duckduckgo.com/?q=toolbox&t=h_&iax=images&ia=images
https://en.wikipedia.org/wiki/Toolbox

(1b) metafoorina: virtuaalne riistastik
Wiktionary:
2. (computing) a set of pre-existing routines for use in writing new programs
https://en.wikipedia.org/wiki/Macintosh_Toolbox