Apache is a free and open-source cross-platform web server software.
Dreamweaver is a development tool for creating, publishing, and managing websites and mobile content.
HTTP Strict Transport Security (HSTS) informs browsers that the site should only be accessed using HTTPS.
PayPal is an online payments system that supports online money transfers and serves as an electronic alternative to traditional paper methods like checks and money orders.
Twitter is a 'microblogging' system that allows you to send and receive short posts called tweets.