CD-R: is a recordable disc that can be written to once, while CD-RW is a rewritable disc that can be written to multiple times.

Blu-ray disc : A digital optical storage device which was intended to replace the DVD format.

CD-ROM disc : An optical storage device that is read-only or
cannot be modified nor deleted.

DVD-R, DVD+R, DVD-RW and DVD+RW disc: DVD-R and DVD+R are recordable discs that can be written to once, while DVD-RW and DVD+RW are rewritable discs that can be written to multiple times. The difference between the + and – is in the formatting and compatibility.

Memory card :An electronic flash memory device used to store digital information and commonly used in mobile electronic devices.

Memory stick : A memory card that is removable.

SSD – Solid State Drive – A flash memory device that uses
integrated circuit assemblies to save data steadily.

USB flash drive, jump drive or thumb drive : A small, portable storage device connected through the USB port.

Cloud storage : Data is managed remotely and made available over a network. Basic features are free to use but upgraded version is paid monthly as a per consumption rate.

Network media : Audio, Video, Images or Text that are used on a computer network. A community of people create and use the content shared over the internet

OMR – stands for Optical Mark Recognition – A process of capturing marked data of human from forms like surveys and tests. It is used to read questionnaires with multiple choices that are shaded.