A tag is a keyword or label that categorizes your question with other, similar questions. Using the right tags makes it easier for others to find and answer your question.
software platform and application user interface software on Nokia's broad range of mid-tier feature phones
a nonproprietary alphanumeric code to uniquely identify scientific and other academic authors and contributors.
for ABAP (the SAP programming language) related questions.
Software specifically for Windows RT, a version of Windows 8 designed for devices with ARM processors. Please tag with [windows] instead unless your question involves functions specific to Windows RT.
the process of presenting tests to individuals and analyze the results. If your question is about tests for humans you should tag it with this tag.
when seeking recommendations for software related to Stack Exchange Winterbash, an annual holiday event in which users wear hats upon their avatars.