42 Providing software as a service (SAAS) services featuring software for managing chord charts and sheet music for musicians for performances, practices, compositions, educational purposes; providing temporary use of on-line non-downloadable software for executing and managing live musical performances, namely, providing backing musical tracks and multi-tracks for live musical performances, software for executing and managing live musical karaoke performances; providing temporary use of on-line non-downloadable software for projecting lyrics for live musical performances; providing temporary use of on-line non-downloadable software for operating and managing stage lighting, stage theatrical effects and stage automation; providing temporary use of on-line non-downloadable software for processing and managing set lists, run sheets, theatrical cues and stage resource usage reporting; providing temporary use of on-line non-downloadable software for accessing other computer programs with audio content, video, text and other multimedia content; Providing software as a service (SAAS) services featuring software that allow users to access data related to music and musical performances; providing subscription-based temporary use of on-line non-downloadable computer software for playing music and audio, video, text and multimedia content