An autogram is a self-referencing sentence that describes its letter-content.

An example autogram would be: This sentence contains only three a's, three c's, two d's, twenty-five e's, nine f's, four g's, eight h's, twelve i's, three l's, fifteen n's, nine o's, eight r's, twenty-four s's, eighteen t's, five u's, four v's, six w's, two x's, and four y's.

Some autograms are also pangrams, such as: This autogram contains five a's, one b, two c's, two d's, thirty-one e's, five f's, five g's, eight h's, twelve i's, one j, one k, two l's, two m's, eighteen n's, sixteen o's, one p, one q, six r's, twenty-seven s's, twenty-one t's, three u's, seven v's, eight w's, three x's, four y's, and one z.

Note: These autograms are taken from Fun With Words and may be subject to copyright infringement.