The Casio HR-100T is a printing desk calculator that does come with a user's manual. The manual is available for download for a small price at User-Manuals.com.
Anyone looking for the manual can simply go to the User Manual website and use its search engine to find the needed guide. Search for "hr 100t," and it appears as the first option in the results.
Manuals Center also offers the Casio HR-100T manual for a small fee. A user can also find this by searching "hr 100t" on the Manuals Center website. The Manuals Center also offers a free preview of a few pages of the manual itself.