Use "and" instead of &, unless part of a proper noun or a common abbreviation. For example: Notices and slips, not Notices & slips; Baker & Taylor, R&D.
drop-down
Base terminology
Use "dropdown" as one word, not "drop-down" or "drop down".
issue
Base terminology
(noun) For serials: Use with caution. Use "Serial issue". For the action of loaning an item: Do not use. Use "checkout". (verb) Do not use. Use "check out".