3. Types of job aids Checklists record the essential steps in a procedure or components of a system. Format the checklist for printing. For online checklists, use checkboxes so learners can keep track of times completed. Reference summaries recap crucial information in a field. They are sometimes called a crib sheet or cheat sheet . One common form is the pocket-sized card listing commands of a computer program or their keyboard shortcuts. Glossaries define the terms, abbreviations, and symbols in a subject area. Calculators perform mathematical calculations for learners, eliminating the need to memorize formulas and complex tables. E-consultants dispense advice on complex situations. Glossaries, calculators and e-consultants make special use of electronic media, and will be described in greater detail.