Communication devices for linking computer networks; Communications electronics for computers; Communications processing computer software; Compact disc players for use with computers; Component parts for computers; Components for computers; Computer controllers for operating lighting apparatus; Computer controllers for operating sound instruments; Computer data storage apparatus; Computer databases; Computer design hardware; Computer digital maps; Computer diskettes; Computer disks; Computer display instruments; Computer display monitors; Computer driven printers; Computer hard disc apparatus; Computer hardware; Computer hardware for use in computer-assisted software engineering; Computer hardware for use with drilling apparatus; Computer hardware for use with drilling instrument; Computer heat sinks; Computer housings; Computer image projection apparatus; Computer imaging systems; Computer input apparatus; Computer input devices; Computer input instruments; Computer installations; Computer installations (networks); Computer installations for the communication of data; Computer installations for the control of machine tools; Computer installations for the processing of data; Computer interface apparatus; Computer interface cards; Computer interface devices; Computer interface units; Computer interfaces; Computer keyboards; Computer linking units; Computer magnetic memory; Computer memory devices; Computer memory drive units; Computer monitoring apparatus; Computer monitors; Computer mouses; Computer network apparatus; Computer network installations; Computer network operating installations; Computer networking apparatus; Computer networking installations; Computer networks