I started in the trade right out of high school in '71. Wiring houses with as a 4 man shop. They kept me on rough in for months before they let me trim out anything.
I remember Yankee screwdrivers, star bits, brace and bits, offset screwdrivers, wood step ladders, type TW building wire in a box, the aluminum wire years, wrap-loc straps, hicky benders, type TW straps (haha).
I got my masters in '78 and tried to be a "contractor", and realized I didn't know what the hell I was doing, so I took a job as a jr estimator/PM.
I've been estimating ever since. I remember paper takeoffs and "nut and bolt" price sheets and hand pricing and laboring each item with the huge Trade Service manual and Koontz labor book, THEN stay up ALL NIGHT pounding a calculator. I remember Estimatic assembly books, the first computer estimating, having to drive to a GC and pick up plans, count fixtures and gear, make copies and leave copies up front for suppliers could pick them up. Then came the Fax machine. All of a sudden, I can send schedules and counts to many different suppliers, and GC's could invite tons more electricals to the party.
Now everything is electronic. Plans, bid invites, quotes, proposals.
The good news is, I can do it all from anywhere. I work at home on a laptop a lot. No more all night calculator pounding.
It's amazing to look back at all of the changes.