- Migrated to GDrive
H-alpha—hydrogen-alpha (scientific/greek symbol: Hα); spell out both on first use; then H-alpha as appropriate. Do the same for hydrogen-beta and hydrogen-gamma.
hailfall—one word, by analogy with rainfall
headings—Use AP sentence style for all titles heads, and subheads. A heading that includes a colon takes an initial cap after the colon. Example: Zooming in: Winter beauty. For print publications, choose section heading styles and maintain a style sheet to assure consistency.
HYPERchannel—Spell this way. A high-speed local area networking system, esp. for supercomputers, manufactured starting in the 1970s by Network Systems Corporation, no longer in production.
- Do not break words such that:
- one letter is left at the end of a line or two letters appear at the beginning of a line (a-cross and flamin-go are unacceptable hyphenations, even though the words are broken into syllables correctly).
- what looks like an unrelated word is left at the end of a line (pet-ulant is an unfortunate hyphenation).
- Avoid half-word widows at the end of a paragraph if they are shorter than the paragraph indent.
- In layout, do not end a right-hand page with a hyphenated line.
- If a sentence contains an em dash that falls at a line break, put the dash at the end of one line, not at the beginning of the next.
- See also "line breaks".