Quick References

Wikiversity provides several quick reference guides, available from the following links.
 * Arithmetic and algebra
 * Operator precedence—the order of operations.
 * Basic Laws of Algebra
 * Calculus
 * Chemistry (not yet available)
 * Electrical Engineering
 * Emotions
 * Geometry (not yet available)
 * Intellectual virtues
 * Logic
 * Logical fallacies
 * Moral virtues
 * Physics Cheat Sheets
 * Linux/Basic_commands
 * Table of Physical Constants
 * Thinking Tools
 * Trigonometry Identities
 * Wise Affirmations