A common standard today is .28. One last word on monitors, but this is in reference to making a choice when buying a laptop. You will be very glad you did. This really refers to the video adapter, which is a separate item from the monitor. It refers to the piece of hardware that allows your monitor and your PC to send information back and forth.
Video adapters have memory as one of their components.
The more memory on the video card, the faster response you're going to get as the screen redraws. You'll pay for it though. For many applications today, a video adapter with 1 or 2 Mb of memory should be sufficient. If you plan on communicating with the outside world, corresponding via email, or accessing the Internet, you must have a modem. Modems come in a variety of speeds, with of course the bottom line being, the faster the better.