List of countable ordinals


 * Omega
 * Epsilon
 * Cantor
 * Feferman-Schutte Ordinal
 * Ackermann Ordinal
 * Small Veblen Ordinal
 * Large Veblen Ordinal
 * Bachmann-Howard Ordinal
 * First Psi Ordinal
 * Takeuti-Feferman-Buchholz Ordinal
 * Third Psi Ordinal
 * Omega One Chess
 * Church-Kleene Ordinal
 * Infinite Time Turing Machine Ordinals