1970s + amp + angular + block + circuit + circuit board + circuitboard + circuitry + computers + connected + curls + curly + current + dingbats + dots + ee + electrical + electrical engineering + electricity + electronic + electronics + engineering + girly + grunge + logic + mathematical + MICR + molecules + motherboard + OCR + party + schematics + sketched + spirals + square + symbols + twirls + wire + xor + zig-zag +