WAMP refers to a web development software stack utilizing Windows, Apache Web Server, MySQL database, and the PHP programming language. Compare with LAMP. This tag is specifically for the 64 bits version.
WAMP stands for windows, apache, mysql and php. It refers to preconfigured packages that include those components. It is usually meant for development purposes only, not for production use. This is due to the insecure default settings, which are designed to get a developer up and running quickly. In production environments, it's usually preferable to install and configure each component separately.
There are both 32 bits and 64 bits from the same version release. It is characterized by the ability to switch Apache, MySQL and PHP releases. There are some other packages like WAMP such as xampp and ampps