Historical clue formulations

• Some Caltech alums: Abbr. — 2017-05-26
• Some M.I.T. grads: Abbr. — 2014-06-25
• Some R.P.I. grads — 2010-08-19
• Many Caltech grads: Abbr. — 2010-01-30
• Some specialize in elec. — 2007-09-21
• Some M.I.T. grads: Abbr. — 2007-03-11
• Some M.I.T. grads — 2000-11-24
• M.I.T. grads: Abbr. — 1998-07-10
• M.I.T. grads — 1998-07-01