International Journal of Information Studies Issac Newton, A, Gomathi, P 11 2 2019 http://www.dline.info/ijis/fulltext/v11n2/ijisv11n2_2.pdf Digital preservation is largely experimental and replete with the risks associated with untested Digital preservation strategies are shaped by the needs and constraints of repositories with little consideration for the requirements of current and future users of digital scholarly resources. Digital technology brings with it untold benefits for heritage preservation access. Once a document has been properly digitized, it becomes immortal and can remain accessible long after the original has ceased to exist. This Paper mainly focuses on methods and techniques, digitalization, and also preservation of digital documents in the Libraries.