Am 12.10.2013 um 14:06 schrieb Michael Ash <mash@econs.umass.edu>:

The code is at
http://bay.uchicago.edu/tex-archive/macros/context/contrib/context-letter/tex/context/third/letter/base/t-memo.mkiv

The memo module is slightly modified version of the letter module with
different command names and a different layout.

The code for the module is in the file s-cor-02.mkvi and s-cot-00.mkvi,
the file t-memo.mkiv you’re referring to is a dummy file for TeX Live 2012
to prevent error messages.

\usemodule[memo]

\usememostyle[margin] % table

\setupmemooptions
  [bodyfont=pagella]

\setupmemo
  [fromname={John Simmons},
   fromaddress={Parkstreet 12\\8257 Green Bay}]

\setupmemo
  [toname={Steve Wilson},
   toaddress={Nightstreet 4a\\9183 Cotton Village}]

\setupmemotext
  [copy=cc: ,
   enclosure=encl: ]

\setupmemo
  [copy=Copy,
   enclosure=Enclosure,
   postscript=Postscript]

\setupmemosection[head][style=bold]
%\setupmemosection[content][align={right,broad}]

\startmemo
  [opening={Dear Mr. Wilson,},
   subject={Ideas for a new typesetting system},
   closing={Best regards},
   signature={John Simmons}]

\dorecurse{4}{\input knuth\par}

\stopmemo

Wolfgang