1. HISTORICAL

   Α

   Greek isopsephy

   Α=1 … Θ=9, Ι=10 … Π=80, Ϙ=90, Ρ=100 … Ω=800, Ϡ=900.

   Ἶσις · 420

2. HISTORICAL

   א

   Hebrew gematria (mispar hechrachi)

   א=1 … ט=9, י=10 … צ=90, ק=100, ר=200, ש=300, ת=400.

   עשן · 420

3. MODERN

   A

   English ordinal

   A=1, B=2, … Z=26.

   ITHACA · 42

Registry

The machines

Three alphabets. Three histories. Same kind of operation is not the same culture. More faces mean more chances to find a door open. We launch labeled, versioned.