Records Relating to Manuscripts | Indianapolis Museum of Art Archives
From the Society of American Archivists Glossary of Archival and Records Terminology:
n. (<span class="sublemma">ms</span>, abbr.) ~ 1. A handwritten document. - 2. An unpublished document. - 3. An author's draft of a book, article, or other work submitted for publication.
Notes: Other abbreviations include <span class="sublemma">mss</span> for manuscripts (plural) and <span class="sublemma">MsS</span> for manuscript signed. - Manuscript1 is principally text or musical notation on paper, but may be supplemented by drawings. Typewritten documents are generally classified as manuscripts but are more accurately described as typescripts.
Citations: †(APPM2 1989, 1.0A) Any text in handwriting or typescript (including printed forms completed by hand or typewriter) which may or may not be part of a collection of such texts. Examples of manuscripts are letters, diaries, ledgers, minutes, speeches, marked or corrected galley or page proofs, manuscript books, and legal papers.