The acronym LAMP refers to a solution stack of software, usually free software / open-source software, used to run dynamic Web sites or servers. The original expansion is as follows:
- Linux, referring to the operating system;
- Apache, the Web server;
- MySQL, the database management system (or database server);
- PHP, the programming languages.
The combination of these technologies is used primarily to define a web server infrastructure, define a programming paradigm of developing software, and establish a software distribution package.
I’ve made this small graphic (80×15 pixels) that you can use to designate your usage of this type of server. 
