Handwriting is writing written by hand, usually with a pen or pencil.
Adric found that the Fourth Doctor had "marvellous" handwriting. (TV: The Keeper of Traken [+]Johnny Byrne, Doctor Who season 18 (BBC1, 1981).)
The Eleventh Doctor wrote a note for Amelia Pond, telling her to come to the National Museum. When a past version of the Doctor questioned how she knew to come, Amelia showed him the note, which he immediately recognised as his own handwriting. (TV: The Big Bang [+]Steven Moffat, Doctor Who series 5 (BBC One, 2010).)