health care (adj. or n. phrase)
Two words, never a hyphen.
Never hyphenated, either, even as an adjective.
Hispanic, Hispanic American
A home page is the main page of an individual’s or organization’s site on the World Wide Web. The term home page is lowercase, and two words. (Note that Web site is also two words, but Web is capitalized.)
HTML stands for Hypertext Markup Language. Always capitalize the acronym.
HTTP stands for Hypertext Transfer Protocol. Again, capitalize the acronym. The http:// in a Web address (URL) tells the browser that the address follows the standards set forth by HTTP.