Experience in transport, warehousing, quality control, general manufacturing, electronics, automotive, distribution, design in many different mediums including jewellery, graphics and invention. Started computers in the early 80's with dedicated BASIC machines eg. Sinclair ZX81, BBC B micro, 2 installed sim's and 286 to Pentium
Personally I think the word 'expert' is too strong, I would prefer 'Jack of all trades' (SEMI) master of one or two.
Most of the fields I have picked up a working knowledge of are self taught through books and a constant barrage of questions to people who do actually know what they are doing.