PIOTR KLEIN SysLab

62.90.Z - Other IT and computer-related services

26.20.Z - Manufacture of computers and peripheral equipment

27.31.Z - Manufacture of optical fiber cables

47.40.Z - Retail sale of information and communication technology equipment

58.19.Z - Other publishing activities, excluding software publishing

58.29.Z - Publishing of other software

61.10.A - Activities in the field of wired, wireless, and satellite telecommunications

61.10.B - Activities in the field of wired, wireless, and satellite telecommunications

61.20.Z - Activities related to the resale of telecommunications services and telecommunications mediation

61.90.A - Activities in other telecommunications fields

62.10.B - Programming activities

62.20.A - IT consulting and IT equipment management activities

62.20.B - IT consulting and IT equipment management activities

63.10.A - Services related to computing infrastructure, data processing, website management (hosting), and related activities

63.10.B - Services related to computing infrastructure, data processing, website management (hosting), and related activities

63.10.C - Services related to computing infrastructure, data processing, website management (hosting), and related activities

63.10.D - Services related to computing infrastructure, data processing, website management (hosting), and related activities

63.91.Z - Portal and search engine activities

95.10.Z - Repair and maintenance of computers and telecommunications equipment