what is the most advanced computer in the world at the present moment?

Answer 1

The No. 1 position was again claimed by the BlueGene/L System, a joint development of IBM and DOE’s National Nuclear Security Administration (NNSA) and installed at DOE’s Lawrence Livermore National Laboratory in Livermore, Calif. BlueGene/L also occupied the No. 1 position on the last three TOP500 lists. It has reached a Linpack benchmark performance of 280.6 TFlop/s (“teraflops” or trillions of calculations per second) and still remains the only system ever to exceed the level of 100 TFlop/s. This system is expected to remain the No. 1 Supercomputer in the world for the next few editions of the TOP500 list.

Answer 2

International Business Machines Corp. (IBM)had developed the world's most advanced quantum computer, a device based on the mysterious quantum physics properties of atoms that allow them to work together as a computer's processor and memory.

IBM said the computer, which uses five atoms to work as its processor and memory, demonstrates for the first time the potential of such devices to solve certain problems at a rate remarkably faster than conventional computers. The experimental machine is considered the next step towards a new class of devices capable of superfast calculations.

"A quantum computer could eventually be used for practical purposes such as database searches -- for example searching the Web could be sped up a great deal -- but probably not for more mundane tasks such as word processing,"

Answer 3

I'd still have to go with the human mind. (Though mine could probably do with a reboot.)