This article throws light upon the top fourteen input devices used in a computer. Some of the input devices are: 1. Punched Cards Input 2. Paper Tape Input 3. Magnetic Tape 4. Magnetic Disk 5. Disc Systems (Floppy) 6. Winchester Disk 7. Keyboard 8. Terminals 9. Mark and Character Recognition 10. Optical Mark Reading (OMR) 11. Optical Character Recognition (OCR) [...]
This article throws light upon the top five output devices used in a computer. The output devices are: 1. Printers 2. Visual Display Units (VDU) 3. Plotters 4. Computer-Output-to-Microfilm (COM) Units 5. Audio Output. Output Device # 1. Printers: Printers may be classified as: Also as: (i) Serial Printers: (a) Daisywheel Printer: Daisywheel printer is so called because it uses [...]
This article throws light upon the five main types of operating systems. The types are: 1. Batch Processing 2. Multi-Programming 3. Interactive Processing 4. Time Sharing 5. Real-Time Processing. Type # 1. Batch Processing: It is desirable to hold programs until a reasonable size batch of programs can be processed. In batch processing, data to be processed is accumulated over [...]