O

	Name		Country	City
1	O-Set		Russia	Gatchina
2	O.C.A	simbols	Russia	Chaykovskiy
3	O.E. Ltd		United Kingdom
4	O.I.C. Ltd		United Kingdom
5	O.Sheen Software		United Kingdom
6	Oasis Software		United Kingdom
7	Oberon Group		Ukraine	Odessa
8	Ocean Software Ltd	Atari Inc	United Kingdom
9	Ocean-Imagine Hellas		Greece
10	OCTA Soft		Hungary
11	Octopus Software		United Kingdom
12	odessamic
13	Odin
14	Odin Computer Graphics Ltd		United Kingdom
15	Odisea Software		Spain
16	Odyssey Computing		United Kingdom
17	Offence		Norway
18	Ofites Informatica		Spain
19	Okoloko Engineering Software		United States
20	Oktogonia
21	Old English Software		United Kingdom
22	Oldrich Palenicek		Czech Republic
23	Oldsoft		Czech Republic
24	Oleg Oursoft		Russia
25	OLSoft Company		Russia	Ufa
26	Olympic Software		United Kingdom
27	Omega		Czech Republic
28	Omega Games		United Kingdom
29	Omega Group		Russia	St.Petersburg
30	Omega Hackers Club		Russia	Chelyabinsk
31	Omega Hackers Group		Russia	Rostov-on-Don
32	Omega Ltd
33	Omega Software		Ireland
34	Omega Software		United Kingdom
35	Omega Software	Cambridge Research
36	Omega Software GFX		Czech Republic
37	Omega Software Ltd
38	Omega-Soft		Germany
39	Omega-Soft		United Kingdom
40	Omen Group
41	Omen Software	Wordlight Ltd
42	Omicron Projects		Spain
43	Omikron Software		Czech Republic
44	Omikron Software		Germany
45	OMK Software S.L.		Spain
46	Omni Software		United Kingdom
47	Omnisoft		United Kingdom
48	Omycron Software		Portugal
49	ON6LJ Software		United Kingdom
50	One Week Productions		United Kingdom
51	Oni Records		United Kingdom
52	Online PLC		United Kingdom
53	ONOsoft		Czech Republic
54	Onspec Software		United Kingdom
55	OOPS		Russia	Odintsovo
56	OpalSoft		United Kingdom
57	Opera Soft S.A.		Spain
58	Optical Brothers		Belarus	Minsk
59	Optical Illusions		United Kingdom
60	Optimal Group		Russia
61	Optimus Software		United Kingdom
62	Options International		United Kingdom
63	Orange Enterprizes		United Kingdom
64	Orange Software		United Kingdom
65	Orbis Publishing Ltd		United Kingdom
66	Origin Systems Inc		United States
67	Original Computers Association	simbols	Russia	Chaykovskiy
68	Original Soft		Italy
69	Orijon Software		Germany
70	Orin Soft		Czech Republic
71	Orion		Portugal
72	Orion		Poland
73	Orion		Russia	Krasnouralsk
74	Orion Data Ltd		United Kingdom
75	ORION Group		Ukraine	Donetsk
76	Orion Group		Russia	Chelyabinsk
77	Orion Ostrava		Czech Republic
78	Orion Software		Czech Republic
79	Orion Software		United Kingdom
80	ORION SOFTWARE		Russia	Perm
81	Orion Software Group		Russia	Andreapol
82	Orion Software Group	Illusion Dreams	Russia	Yoshkar-Ola
83	Orionsoft		Spain
84	Orpheus Ltd		United Kingdom
85	Orwin Software		United Kingdom
86	Oscar & Spilberg
87	Oscar Soft		Spain
88	Oscar Systems		United Kingdom
89	osh Group		Russia
90	OSM Co Ltd		Belarus	Minsk
91	OSSoft		United Kingdom
92	OtaSoft		Czech Republic
93	Outland Corporation		Moldova	Chișinău
94	Outlaw	Palace Video Group	United Kingdom
95	Outlet		United Kingdom
96	Outsiders
97	Overfile Software		Russia	Kirov
98	OverPower Soft		Russia	Sarapul
99	Oversun Frendship		Russia	Severodvinsk
100	ovich
101	Oxbridge Technology Ltd		United Kingdom
102	Oxford Computer Publications Ltd		United Kingdom
103	Oxford Computer Publishing	Oxford Computer Publications Ltd	United Kingdom
104	Oxford Computer Systems		United Kingdom
105	Oxford Digital Enterprises	Empire Interactive
106	Oxford Mobius	Nigel Lea	United Kingdom
107	Oxford Software Group		United Kingdom
108	Oxford Technologies		United Kingdom
109	Oxygen Software		United Kingdom
110	Oz Software		United Kingdom
111	Ozero Ltd		Russia	Novosibirsk
112	Ozzyos Software		Czech Republic
113	Орион