Some Internet Terms & Definitions. Add-ons - An add-on (aka plug-in or extension) is a software application that runs within another program for the purpose of changing or enhancing the programs performance Apps - Short for application, an "app" is a program designed to operate within a mobile system. Broadband - A high speed internet connection is known as broadband. Ecommerce - Ecommerce refers to the buying and selling of items on the internet Malware - Malware is software specifically designed to damage or disrupt a computer system Phishing - Phishing refers to a type of online scam where criminals pose as representatives of legitimate businesses or organizations in order to obtain sensitive user information Spam/Spamming - Spam typically refers to unsolicited junk mail and blog comments