Providing temporary use of on-line non-downloadable cloud computing software accessible via a browser or a stand-alone software application, that enables users to interact with each other, namely, to view and download files and pictures, transmit and receive electronic messages, manage personal and shared databases, perform scheduling, calendaring, relationship management, buying and selling of goods or services, making reservations or bookings, and for sharing with other software users such purchase, scheduling, booking and messaging information, as well as sharing pictures, and electronic files