Reusable software services, namely, providing temporary use of on-line non-downloadable software development tools for development, deployment, and execution of computer systems, applications, and application programming interfaces (API); Providing temporary use of on-line non-downloadable software development tools used in building Software as a service (SAAS) featuring software for development, deployment, and execution of computer systems, applications, and application programming interfaces (API); Providing temporary use of on-line non-downloadable software development tools used in building Platform as a service (PAAS) featuring computer software platforms for development, deployment, and execution of computer systems, applications, and application programming interfaces (API)