Meaning: Able to withstand attack. Synonyms: unassailable; unattackable; impregnable; inviolable; secure; strong. Context examples: an impregnable fortress / fortifications that made the frontier inviolable. Similar: invulnerable (immune to attack; impregnable)
Definition - What does Magnetic Disk mean? A magnetic disk is a storage device that uses a magnetization process to write, rewrite and access data. It is covered with a magnetic coating and stores data in the form of tracks, spots and sectors. Hard disks, zip disks and floppy disks are common examples of magnetic disks.
Magnetic disks are the most common type of secondary storage. They may be either floppy disks or hard disks (hard drives).PERIPHERAL DEVICESPeripheral devices include all the input and output devices used with a computer system. When these devices are under control of the CPU, they are said to be on line.