Were there times that you wished you had your notebook with you but unfortunately, you didn’t? And you wandered into a cybercafe only to realise that they didn’t have your favourite application installed; or MS Office, for that matter? Of course you can use online document and spreadsheet editors but what if there’s no internet connection?

One day you may find that a certain hotel has a T3 line and wish that you can just jack your laptop into it to continue downloading your unfinished prawn with your favourite bittorent client. But the staff in-charge insists that you can only use their PCs. Worse, they are all in weird Japanese or Korean interface!

You may have played a game half way and wish to continue playing it on another PC. You may like a wallpaper so much that you wish every PC that you use has the same wallpaper.

You wish that you can carry your browser and bookmarks with you without resorting to using Google Toolbar. You may even wish to carry the whole planetarium, Google Earth, media players along with their codecs, photo editor, input methods etc. Heck! Might as well carry the whole operating system with you!

If you don’t already know, it can be done! And it’s easy. In fact, everytime you switch on any computer running Windows or Linux and plug your portable storage device (a memory card or external HDD for example) into a USB slot, all your favourite programmes are already in place!

Welcome to the world of portable operating system.