that, which — Use that for essential clauses. Do not use a comma. Use which for nonessential clauses, and use commas.
The author’s goal was to write a book that would capture the imagination.
Her latest book, which I’ve read a dozen times, is a best-seller.
that and who — Use that for inanimate objects and who for people.
Yes: He is the man who married my sister.
No: He is the man that married my sister.
theater, Theatre — Use theater unless the proper name is Theatre.
School of Theatre & Dance, Lyndall Finley Wortham Theatre
Tier One — Two words, each capitalized, with no hyphen (even when used as a modifier).
UH is on the road to Tier One.
UH has Tier One goals.
Tier One Scholar and Tier One Scholarship (wordmarks referring to a UH financial assistance program)
time — see a.m. and p.m.
titles — Capitalize formal titles used before an individual’s name. Lowercase and spell out titles when they are not used with an individual’s name. Set off the title by commas after an individual’s name. A formal title denotes scope of authority, professional activity or academic activity as opposed to occupational descriptions.
totaling — not totalling
toward — not towards
traveling — not travelling