ready reserve – Lowercase.
reserve – Capitalize when referring to the U.S. Armed Forces: Army Reserve, Navy Reserve, Marine Corps Reserve, Air Force Reserve. When referring to the reserve component, use lowercase. Capitalize Individual Ready Reserve, but lowercase ready reserve and selected reserve. Lowercase the plural form reserves in all uses.
reserve component – Refers to all reserve forces of the United States, including the National Guard (and, technically, the ROTC, though this rarely is intended by the user/speaker). Not capitalized. Example: The reserve components face a cut of more than $3.5 billion in the next federal budget.
Reserve Officers’ Training Corps – ROTC is acceptable in all references. When the service is specific, use Army ROTC, Navy ROTC, or Air Force ROTC. Do not use AROTC, NROTC or AFROTC.
reservist – Use lowercase in all references except when starting a sentence.
resume – Use this term without the accents when referring to a work history summary.