Definition of beaker for Students. : a cup or glass with a wide mouth and usually a lip for pouring that is used especially in science laboratories for holding and measuring liquids.
In Microsoft Windows, each environment variable's default value is stored in the Windows registry or set in the AUTOEXEC.BAT file. On Unix, a setuid program is given an environment chosen by its caller, but it runs with different authority from its caller.
1 In the User variables section, click New. The New User Variable dialog box opens.  Enter the name of the variable and its value, and click OK. The New User Variable dialog box closes, and the variable is added to the User variables section of the Environment Variables dialog box.