42 PLANNING OF DATA PROCESSING HARDWARE AND SOFTWARE SYSTEMS; MAINTENANCE OF COMPUTER SOFTWARE; PRODUCTION, NAMELY, PUBLISHING OF COMPUTER SOFTWARE AND ELECTRONIC DATA PROCESSING TEACHING MATERIALS; COMPUTER PROGRAMMING FOR OTHERS; TECHNICAL WRITING FOR OTHERS; TECHNICAL SUPPORT SERVICES, NAMELY, TROUBLESHOOTING OF COMPUTER HARDWARE AND SOFTWARE PROBLEMS VIA TELEPHONE, FAX AND IN PERSON; LEASING AND LICENSING OF COMPUTER SOFTWARE IN THE FIELD OF DATA PROCESSING; LEASING OF COMPUTERS; CONSULTATION REGARDING THE MAINTENANCE OF DATA PROCESSING SYSTEMS; CONSULTATION REGARDING DATA PROCESSING HARDWARE AND SOFTWARE SYSTEMS