The theme of the gamma series of 21.4 releases is "oxymoron", that is, contradiction in terms. Each patchlevel will be assigned a unique codename from the list below. The rationale for the first should be obvious. The second and third are my tributes to Richard Stallman and the early developers of Lucid Emacs/XEmacs (primarily Jamie Zawinski, but it also fits Ben Wing which is appropriate to the Mule theme), in chronological order. I cannot list all the debts this release owes for individual contributions, but I must credit the fundamental excellence of the design of [X]Emacs for inspiring the audacious proposal to add both GTK and Windows/MULE to XEmacs over a period of two months, and for the success of the GTK merge. Without the prospect of such a big win, I could not have justified trying to coordinate a release myself. 21.4.0: Solid Vapor 21.4.1: Copyleft 21.4.2: Developer-Friendly Unix APIs 21.4.3: Academic Rigor 21.4.4: Artificial Intelligence 21.4.5: Civil Service 21.4.6: Common Lisp 21.4.7: Economic Science 21.4.8: Honest Recruiter 21.4.9: Informed Management 21.4.10: Military Intelligence 21.4.11: Native Windows TTY Support 21.4.12: Portable Code 21.4.13: Rational FORTRAN 21.4.14: Reasonable Discussion 21.4.15: Security Through Obscurity 21.4.16: Corporate Culture 21.4.17: Jumbo Shrimp 21.4.18: Social Property 21.4.19: Constant Variable 21.4.20: Double Solitaire 21.4.21: Educational Television 21.4.22: Instant Classic 21.4.23: Moral Majority 21.4.24: Standard C 21.4.25: Too Much Mozart 21.4.26: Working Vacation