Digitization is the process of converting information into a digital format where the information is organized into bits and separately addressed by bytes. This is the binary data that electronic devices with computing capacity can process.
Text and images are digitized similarly. A scanner captures an image and converts it to an image file like a bitmap. An optical character recognition analyzes a text and converts each character into an ASCII code.
Audio and video digitization adopts analog-to-digital conversion processes in which an analog signal is changed into a digital signal without changing its content.
Digitizing information is easier to maintain, record, and share. For example, if the document content is digitized, it is available to people worldwide. According to an article in The Guardian in March 2007, if all spoken language were digitized. It consumes five exabytes of storage space. Digitization is the key to store the information in digital format.