VOID OPTICAL SYSTEMS IRENA JURCZYK-WELON

61.10.Z - Wired telecommunications activities

61.20.Z - Wireless telecommunications activities, excluding satellite telecommunications activities

61.90.Z - Other telecommunications activities

62.01.Z - Computer programming activities

62.03.Z - Computer facilities management activities

62.09.Z - Other information technology and computer service activities

63.11.Z - Data processing, hosting and related activities

73.12.C - Intermediation in the sale of the place on advertising aims in electronic media (Internet)

95.11.Z - Repair and maintenance of computers and peripheral equipment