### Old LaTeX font references such as `\tenrm`

LaTeX 2.09 defined a large set of commands for access to the fonts that it had built in to itself. For example, various flavours of `cmr` could be found as `\fivrm`, `\sixrm`, `\sevrm`, `\egtrm`, `\ninrm`, `\tenrm`, `\elvrm`, `\twlrm`, `\frtnrm`, `\svtnrm`, `\twtyrm` and `\twfvrm`. These commands were never documented, but certain packages nevertheless used them to achieve effects they needed.

Since the commands weren't public, they weren't included in LaTeX2e; to use the unconverted LaTeX 2.09 packages under LaTeX2e, you need also to include the rawfonts package (which is part of the LaTeX2e distribution).