Types of memory
Floppy disc: –
it is a very popular and common storage device. It is portable, i.e., we can carry our data in a floppy and use it any computer having a floppy drive, to view, change and store new data.
A floppy in a circular in shape but is enclosed in a square plastic cover that protects it from dust and scratches. The read/write head in the floppy drive reads and write the data on the floppy. These days’ floppies come in the standard size of 305 inches
Random access memory (RAM) is a type of data storage used in computers that are generally located on the motherboard. This type of memory is volatile and all information that was stored in RAM is lost when the computer is turned off. On the other hand, the control unit can access data from RAM at a much faster rate than from the hard disc.
Read-only memory (ROM) is a type of storage medium that permanently stores data on personal computers (PCs) and other electronic devices. ROM is non-volatile; even after you turn off your computer, the contents of ROM will remain. ROM is costly and is attached to the computer at the time of manufacturing the computer by manufacturers
PROM comes as a blank chip and gives the option of programming it as required. Once the instructions are stored, i.e., the chip is programmed, it becomes ROM and the recorded information cannot be changed.
The instructions stored on it can be erased by exposing the memory chip to ultraviolet light and then fresh instruction can be stored again. When EPROM is in use, Data can only be read from it.
In this type of ROM, electrical signals erase the instruction after which new ones can be stored.
Therefore, EPROM and EEPROM are types of ROM that are reusable.