API Terms
A
API
API stands for Application Programming Interface, which is a set of protocols and tools for building application software to communicate over the internet.
B
BROWSER
A browser is a computer program that stays on a computer enabling users to use the computer to view WWW documents and access the Internet. Firefox, Internet Explorer, Mozilla, Safari, and Opera represent some browser examples. 
D
DELETE Method
Delete a resource from the server. 
F
FTP
FTP is the abbreviation for File Transfer Protocol. It is a network protocol that is a standard. FTP can be used to transfer files from one computer to another over a TCP-enabled network. The FTP protocol is often used to upload web pages to a hosting server. It can be used to access online software files or to transfer files between an account and a desktop computer.
H
HOST
This represents a computer on a network that contains services available to other computers on the network.
HTML
(Hypertext Markup Language) – It is the code in which the World Wide Web documents are written, which uses “tags” to tell browsers which parts of a Home Page are icons, displayed as links, or have hierarchical importance, etc.
HTTP
HTTP or Hyper Text Transfer Protocol (HTTP) is the communications protocol that enables browsing the Web.
HTTP Methods
POST, GET, PUT, PATCH, and DELETE are the most commonly used HTTP methods. They are equivalent to the Create, Read, Update, and Delete operations within a database.
HYPERTEXT
Is a system in which different types of documents such as text, images, or sounds are linked and can be accessed using a “browser”.
I
IP
IP stands for “Internet Protocol,” which is the set of rules governing the data sent over the internet or local network. 
IP ADDRESS 

This is the address (numeric address) of a computer that is connected to the Internet. IP addresses are the identifier that allows information to be sent between devices on a network, they contain location information and make devices accessible for communication.
J
JSON
JSON stands for JavaScript Object Notation and is simply a data representation format. It is a lightweight format for storing and transporting data.
O
OS
This represents the actual software that manages a computer system. For example, Windows XP is an OS as well as Windows Vista and Windows 7.
Open API
OpenAPI Specification (formerly Swagger Specification) is an API description format for REST APIs. An OpenAPI file allows you to describe your entire API.
P
PATCH method
PATCH method is used to partially modify the specified resource on the server.
POST Method
POST method is used to send data to a server to create a resource. The HTTP standard says that a POST request should be used when attempting to create a new resource representation. The POST request’s body contains the suggested state representation of the new resource to be added to the server.
PUT Method
The HTTP PUT method is used to update or replace an existing resource on the server.
R
REST
REST stands for Representational State Transfer, and is a popular architectural style for software, especially web APIs. 
U
URL
URL acronym stands for the Uniform Resource Locator, it’s the address of a resource on the Internet.
W
WWW 
WWW acronym stands for the World Wide Web, it’s a term that is used when referring to “The Internet”. It represents the part of the Internet that uses (linking) HTML pages.