Abstract
Regardless of physical status of information, its processing is definitely a material process. H. J. Bremermann was the first who, back in 1962 asked if physical laws limit the rate of any data processing. His positive answer of 1962 has to be corrected to make it compatible with General Relativity. As a result, Bremermann's limit, proportional to mass M of processor, Mc^2/h = ~ (M/gram)10^47 bits per second, should be replaced by an absolute limit (c^5/Gh)^1/2= ~ 10^43 bits per second, where universal constants c, G, and h are the speed of light, the gravitational constant, and Planck's constant. The question of ultimate status of information is intertwined with the problem of Quantum Gravity.
Gennady Gorelik