History of Windows

LYBTFY (Last Year Before The First Year)
BEGINOS BETA

BEGINOS 1.0

BEGINOS 2.0

BEGINOS 3.0

BEGINOS 4.0

BEGINOS 5.0

BEGINOS 6.0

BEGINOS 7.0 (BEGINOS XP)

FY (First Year)
Early OS 1

Early OS 2

Early OS 3 BETA

Early OS 3

TrueOS 0.0

TrueOS 0.31

TrueOS June Testing

TrueOS 1.0

TrueOS 2.0

TrueOS 3.0 (TrueOS skipped version)

TrueOS 4.0

TrueOS 5.0

TrueOS 6.0 (FirstOS Beta)

FirstOS V1

FirstOS V2

FirstOS V2.9

FirstOS V3

Unknown OS

PBOTU (Proto Beginning Of The Universe)
Infintans OS

Millinillians OS

Centillians OS

WorldOS

Universe OS

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