13800000000 B.C.-251 A.D. - Oggosoft.
251 A.D.-1882 - (Old Yen) Malco.
1882-1936 - [No Name]
1936-1975 - MC-OS
1975-13.8e+3000000000000000000006 - Microsoft.
n+13800000000 B.C.-4n³+13.8e+3000000000000000006 - Micro-Infinite Biotechnologies.
4n³+13.8e+3000000000000000006-nⁿ - Atri-Decodisoft.
2E13800000000 B.C.-2E1936 A.D. - Centurosoft.
2E1936-2E1975 - MC-OS
2E1975-2En+13800000000 B.C. - Microsoft.
2En+13800000000 B.C.-2E4n³+13.8e+3000000000000000006 - Micro-Infinite Biotechnologies.
2En³+13.8e+3000000000000000006-2Enⁿ - Atri-Decodisoft.
3E13800000000 B.C.-1975E13800000000 B.C. Centurosoft.
1975E13800000000 B.C.-13.8e+3000000000000000006E13.8e+3000000000000000006 - Microsoft.
13.8e+3000000000000000006E13.8e+3000000000000000006-z74999999999 B.C. - Centaurosoft.
z74999999999 B.C.-z1975 & 2z13800000000 B.C.-1975z13800000000 B.C. - Ultrasoft.
1975z13800000000 B.C.-13.8e+3000000000000000006z13.8e+3000000000000000006 - Microsoft.
13.8e+3000000000000000006z13.8e+3000000000000000006-74999999999 B.C./.1 - Inklion Ultracorporation.
74999999999 B.C./.1-1975/.1 & 13800000000 B.C./.2-13800000000 B.C./.1975 - Supramosoft.
13800000000 B.C./.1975-13.8e+3000000000000000006E13.8e+3000000000000000004/.13.8e+3000000000000000006 - Microsoft.
13.8e+3000000000000000006E13.8e+3000000000000000004/.13.8e+3000000000000000006-∞13800000000 B.C. - Futurosoft.
∞13800000000 B.C.-1975∞13800000000 B.C. - Time-o-soft.

...

13.8e+3000000000000000006∞13.8e+3000000000000000006-ℵ13800000000 B.C. - Ultratimesoft.
ℵ13800000000 B.C.-1975ℵ13800000000 B.C. - Alephversoft.

...

13.8e+3000000000000000006ℵ13.8e+3000000000000000006-nⁿℵnⁿ End-ø-soft.
nⁿℵnⁿ - [No Name].

[WINDOWS NAMES]

13800000000 B.C.-253 A.D. - Vanura.
254 A.D.-1881 - Vindaugus.
1882-1900 - Operating System.
1901-1934 - Codename: "Pluto"
1935-1974 - Spacine Operating System.
1975-1982: Interface.
1983-2030: Windows
2030-2060: Abstraction
2060-2115: Metranium
2115-2183: Spacetime
2183-2283: Clusteris
2283-2496: Universion
2496-2976: Mysterious
2976: Windows