Information System Model (Major components and activities of information systems) Data resources are transformed by information processing activities into a variety of information products for end users. Information processing consists of the system activities of input, processing, output, storage, and control. Customers, salespersons, engineers, clerks, accountants, managers & knowledge workers all physical devices and materials used in information processing. e.g. computers, video monitors, magnetic disk drives, printers, optical scanners Sys: operating system Apps: spreadsheet programs, word processing, payroll Procedures : operating instructions, Manuals (F1) Product descriptions, customer records, employee files, inventory databases Communications media, communications processors, network access, Internet, intranets e-commerce data entry e.g. Recording, editing calculating, comparing, sorting, summarizing reports & displays records on customers, employees, & products indicate proper entry, Beeps, Messages