guys just realised the buttons in the elevator in doors has 13

A short history of the elevator

Redesigning Elevators for the Visually Impaired, by Shailzasharma

Elevator - Wikipedia

Lift shows man heading to 29th floor but that Pasir Ris HDB block has just 16 storeys, Singapore News - AsiaOne

Rep. Virginia Foxx scolds reporters and House colleague blocking her from an elevator

Why you shouldn't blame yourself for pressing the wrong button to call the elevator!

Life is like an elevator. One door closes, you smash some buttons like you're Buddy the Elf, then another one opens and hopefully you're in higher, By NalterDeeds

Someone found a way to make 'press a button, get to a floor' complicated : r/CrappyDesign

These elevator buttons makes no sense. : r/CrappyDesign

ELATEC discusses about selecting right RFID reader for elevators

These 2 buttons both closed the elevator door. Is there any difference in them? : r/whatisthisthing