HTTP Headers
/ˌeɪtʃ.tiː.tiːˈpiː ˈhɛd.ərz/
noun — “the envelope of your web requests telling servers how to handle your data.”
HTTP Headers are metadata sent along with HTTP requests and responses that provide essential information about the communication between clients and servers. They define how content should be handled, cached, authenticated, or displayed, and can include data about the browser, content type, language preferences, and more. Proper use of HTTP Headers improves security, performance, and compatibility.
Master File Table
/ˈmɑːstər faɪl ˈteɪbəl/
noun — "central table of file metadata."