3 ms·

I know what I/O refers to, and I have for the last, I dunno, 30 years. Do I know which letter refers to which state? Not a damn clue. I have never been able to

• layer8 4y ago
  It’s not I/O (the “I” displays with serifs for me), it’s |/⭘ (line and circle). As a mnemonic, you can think of it as 1 and 0 (for on and off). The standby symbol ⏻ combines the two.
  • sethammons 4y ago
    And the 1 represents a connected circuit (power flows when on) and 0 represents a closed loop, no power flowing through, so off.
    • foobarbecue 4y ago
      ??? Electrically, a closed circuit is on, and an open circuit is off. No power can flow in an open circuit.
  • Izkata 4y ago
    > As a mnemonic, you can think of it as 1 and 0 (for on and off). I always thought that's literally what it represented, true (on) and false (off).
• robocat 4y ago
  Yeah, terrible convention, especially because on and off both begin with O. And memory-aid stories don’t help: “those symbols meant open and closed respectively on the vents” - hang on - is O like an open vent or does it mean off?