Fear not!
In the year 21XX, the world is control by the cybernet and
everybody will have their own PErsonal Terminal or PET. PET is a
device containg a Net Navi, a Net Navi is a virtual AI, it'll
remind you to read/receive emails, battle your friend's Net Navi
and you can plug it in the internet to fiight with viruses, the Net
Navi will also act as your friend!