NUS Libraries has acquired a collection of primary sources helpful for the study of Singapore history over several decades. These primary sources are mainly copies of records kept in archives around the world, primarily in the National Archives, U.K., Australia and the USA.
The records may be in print, microfilm or electronic formats.
The National Archives, U.K. has produced animated guides to help people understand archives. This guide entitled "How the records are arranged" shows how records are classified in the National Archives, and explain reference codes.
Another interesting quick guide: "The records we hold"
For more videos, see The National Archives, U.K. website : Quick animated guides