This hazard is present only in pipelines that write in more than one pipe stage or allow an instruction to proceed even when a previous instruction is stalled. The DLX integer pipeline writes a register only in WB and avoids this class of hazards.
The first touchscreen phone was launched in 1992 by IBM.The IBM Simon is also referred as the first smartphone.Simon is the first smartphone to be incorporated with the features of a PDA.
What Is a Touch-Screen Digitizer? Although modern PCs are tied to their keyboards, touch-screen technology takes the place of a keyboard and mouse for smartphones and a host of other devices. To sense the position of your fingertips, the touch screen employs a digitizer, a component that turns the screen into a set of coordinates on a grid.