It was the biggest protest since hundreds of thousands marched in outrage over the massacre of democracy activists occupying Tiananmen Square in Beijing in 1989 .
Hong Kong has not seen such a protest since hundreds of thousands marched in outrage over the 1989 massacre of democracy activists occupying Beijing 's Tiananmen Square .
technique that allows the execution of processes that are not completely in memory, by temporarily transferring pages from ram to disk, by separating the logical and physical memory.