42 Materials and inventory database design services for others; maintenance and installation of computer software containing materials and inventory databases; database development services, namely, compilation of maintenance and inventory data, and bills of materials into a computer database; data conversion of computer programs and data; conversion of legacy and inventory data into standardized and enhanced formats; computer programming; help-line services, namely, technical support services relating to computer hardware, software and programs for cataloguing information and for use in database and inventory management; database development services; recovery of computer data; creating, designing, maintaining and updating websites for others; design, upgrading and optimization of databases and materials management computer systems; store and stock room design services; consultation services, namely, reviewing the layout, content and design of stores and stock rooms of others, and providing advice and consultancy services to others on ways to improve the layout, content and design thereof