Preserving old documents and books in Malayalam in digital formats is very important for the language. The most active effort in this front is lead by Shiju Alex with little support from Government Institutes who are yet to recognize its importance.
Digitization often starts with scanning the old documents as good quality images. The conversion of content in these documents to text is also part of digitization. It is mostly accomplished using a combination of Optical character recognition and manual transcription. Malayalam Wikisource did some efforts on this front for copyright expired documents.