工商業

工 = 二 + 丨 : Mnemonic symbol: a steel beam, since 工 looks like the cross section of a steel beam. In front of the engine ((e)ng1), Gitta Giraffe (gu) is doing some hard work: She's stacking a capacitor (二) on a dinosaur bone (丨) on a capacitor (二). She's not very successful, but then she gets the idea to use steel beams (工) as support.

商 = 立 + 冏 : In front of the anglepod, Sherlock Holmes set up a pop-up store. He sells velvetleaf plants which he put in vases.

商 = 立 + 冏 : In front of the anglepod, Sherlock Holmes set up a pop-up store. He sells velvetleaf plants which he put in vases.

I can't help but see a bullfrog in 业. Maud Younger finds that the climate in the elevator's bathroom are perfect for her new business: growing bullfrogs.