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