"Handwritten annotations" refers to notes, comments, or additional information written by hand on a document or piece of paper rather than being typed or printed. Full definition
The first of these is TruNote, a note - taking app that offers handwriting recognition, handwritten annotation on documents and images, and even drawing capability. (pcmag.com)
But city officials eventually found, after some searching, a set of maps with handwritten annotations (last updated in 1984), and these records were digitized by a UM Flint research team lead by Professor Marty Kaufman. (scientificamerican.com)
The device will have a resolution of 1200 × 1600, the usual E Ink lack of constant screen refresh (this being what makes the battery life so much better than your typical screen options), and a resistive touchscreen capable of handling handwritten annotation and sketching. (ereadertech.com)