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 Ltd
36	Omega-Soft		Germany
37	Omega-Soft		United Kingdom
38	Omen Group
39	Omen Software	Wordlight Ltd
40	Omicron Projects		Spain
41	Omikron Software		Czech Republic
42	Omikron Software		Germany
43	OMK Software S.L.		Spain
44	Omni Software		United Kingdom
45	Omnisoft		United Kingdom
46	Omycron Software		Portugal
47	ON6LJ Software		United Kingdom
48	One Week Productions		United Kingdom
49	Oni Records		United Kingdom
50	Online PLC		United Kingdom
51	ONOsoft		Czech Republic
52	Onspec Software		United Kingdom
53	OOPS		Russia	Odintsovo
54	OpalSoft		United Kingdom
55	Opera Soft S.A.		Spain
56	Optical Brothers		Belarus	Minsk
57	Optical Illusions		United Kingdom
58	Optimal Group		Russia
59	Optimus Software		United Kingdom
60	Options International		United Kingdom
61	Orange Enterprizes		United Kingdom
62	Orange Software		United Kingdom
63	Orbis Publishing Ltd		United Kingdom
64	Origin Systems Inc		United States
65	Original Computers Association	simbols	Russia	Chaykovskiy
66	Original Soft		Italy
67	Orijon Software		Germany
68	Orin Soft		Czech Republic
69	Orion		Russia	Krasnouralsk
70	Orion		Portugal
71	Orion		Poland
72	Orion Data Ltd		United Kingdom
73	ORION Group		Ukraine	Donetsk
74	Orion Group		Russia	Chelyabinsk
75	Orion Ostrava		Czech Republic
76	ORION SOFTWARE		Russia	Perm
77	Orion Software		Czech Republic
78	Orion Software		United Kingdom
79	Orion Software Group		Russia	Andreapol
80	Orion Software Group	Illusion Dreams	Russia	Yoshkar-Ola
81	Orionsoft		Spain
82	Orpheus Ltd		United Kingdom
83	Orwin Software		United Kingdom
84	Oscar & Spilberg
85	Oscar Soft		Spain
86	Oscar Systems		United Kingdom
87	osh Group		Russia
88	OSM Co Ltd		Belarus	Minsk
89	OSSoft		United Kingdom
90	OtaSoft		Czech Republic
91	Outland Corporation		Moldova	Chișinău
92	Outlaw	Palace Video Group	United Kingdom
93	Outlet		United Kingdom
94	Outsiders
95	Overfile Software		Russia	Kirov
96	OverPower Soft		Russia	Sarapul
97	Oversun Frendship		Russia	Severodvinsk
98	Oxbridge Technology Ltd		United Kingdom
99	Oxford Computer Publications Ltd		United Kingdom
100	Oxford Computer Publishing	Oxford Computer Publications Ltd	United Kingdom
101	Oxford Computer Systems		United Kingdom
102	Oxford Digital Enterprises	Empire Interactive
103	Oxford Mobius	Nigel Lea	United Kingdom
104	Oxford Software Group		United Kingdom
105	Oxford Technologies		United Kingdom
106	Oxygen Software		United Kingdom
107	Oz Software		United Kingdom
108	Ozero Ltd		Russia	Novosibirsk
109	Ozzyos Software		Czech Republic
110	Орион