O

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