Some words are tricky. Here's how to write them (UAlbany Libraries guidance)
archive lowercase unless part of proper name
check in (verb), check-in (noun or adj.)
we will check in the charger and give you a receipt
upon check-in, you will get a receipt
this is the check-in queue (adj.)
check out, check in verb, not hyphenated
checkout, check-in noun or adjective
you can check out a laptop available for 4 hour checkout (noun)
stand in our checkout queue (adj.)
ebook, ebooks lowercase with no hyphen
electronic or e-* or digital: Patrons–especially students–expect most resources to be available on the Web.
Bad: "Online help is available through our chat reference service."
Good: "Visit our chat reference service for help."
email lowercase with no hyphen
faculty, faculty member not capitalized
full text two words, lowercase, not hyphenated
homepage one word
instructor only use faculty if you are just talking about faculty; if you are talking about instructors, which includes graduate teaching assistants, use “instructor”
interlibrary loan lowercase, never ILL
librarian not capitalized, preferred over liaison
library catalog not capitalized; prefer library search / the search tool
library staff member, library staff members not just “library staff"
long-term study carrel lowercase, hyphenated
PhD do not use periods within degree titles and organization titles (e.g., PhD, APA)
service desk, single-use service desk
sign in not log in unless necessary for consistency
web page referring to a single page of a website; lower-case, two words
website when referring to an entire website; lower-case, one word