"Notation" refers to a system of symbols, marks, or signs used to represent or express something, usually in writing or mathematics. It helps convey information or instructions in a concise and understandable way. Full definition
sent out for aid nearly always of religious notations of some sort (provided to you by group «X») or («serving God through mission»). (religion.blogs.cnn.com)
The charming Dogs and Birds stand showcased their range of books and accessories, based on an inventive system of notation in which conventional patterns are demystified using dog and bird symbols. (educationbusinessuk.net)
An inveterate walker — often from her home or studio in Brooklyn to Manhattan — Heller makes notations on small pads while traveling on foot, establishing palpably both the vantage point from which she is drawing and the expansive scene in front of her. (brooklynrail.org)