All of the Parts of Speech (POS) Taggers give the tags in the form of shortcodes like (NNS,VBZ etc).
This/DT page/NN is/VBZ about/IN the/DT Brill-tagger/NNP
Like the above example which is from one of the online POS Taggers.
Where can I find the meaning of each shortcodes?
English taggers often use the Penn Treebank Tagset. Here you can find a quick overview and the official detailed annotation guidelines.