back when i was a kid, when mum and dad wanted to make an international call, i remembered that we would drive down to this building which i presume it's a phone company, and got ourselves into one of the many little phone booths.

few years later, we would purchase a phone card from a convenience store, then get to the nearest public phone and insert the card in to make local or international calls.

then things became more convenient. we would buy a card from a convenience store, scratch the card for the pin number and make a toll-free calls from home.

as the internet era began, we no longer have to get up from our seats just to buy a phone card.

when skype emerged few years later, it eliminated the need for home or cell phones to make an international call. all that's needed is a headset for free pc-to-pc calls and a credit card for pc-to-landline/cell phones.

the trend continues to this day with handheld devices capable of using skype to make calls.

we have come so far. technology help us save cost and time. what else can be done? what's next?

well, i believe that there is more invention, innovation and opportunity to conbine technology and energy, and make something really really useful.