
▲ 109 r/1970s
Was there a test for OCD in the seventies? Yes, there was.
u/Creepy_Basis_4869 — 20 hours ago

From top to bottom, left to right: HP Prime G1, TI–36X Pro, HP-35S, fx-115ES+, fx-991EX, HP-12C, DM–41X, HP-41CX (with PPC ROM, X Memory, Advantage module, & ZENROM), DM-16L, TI–84+ CE, DM–15L, HP-15C, TI-nspire CX II, HP-50G, fx-CP400, NumWorks, DM-41L, fx-CG50, HP Prime G2, HP-42S, HP–32SII, HP-48G+, DM–42, HP-49G+, TI-nspire CX, DM–42n, and TI–84 EVO.
As a relatively recent Lego builder, I have learned two things the hard way - one, is that I need to pay close attention to the orientation of these pieces - vertical or horizontal - and two, I no longer throw away any of the plastic bags until the entire model has been completed! What about you?