Comparison of 'questioned' handwriting with known writing from one or more individuals to determine whether or not the same writer could be responsible.
Examination of printed, photocopied and typewritten documents to determine whether or not they can be linked together or to a specific machine.
Examination of a disputed signature and comparison with known signatures of the individual to determine whether or not it could be genuine.
Transcription of documents.
Examination of documents to determine authenticity and/or for evidence of alteration.