This is the most common standard for video cards, offering a picture that consists of 640 pixels horizontally and 480 pixels vertically. While VGA offers adequate resolution for basic word processing, it falls short for users who work with multiple windows, complex spreadsheets or large graphics. These show resolutions ranging anywhere from 800x600 up to 1600x1280 pixels. With super-VGA standards, users can see dozens of additional spreadsheet rows, or as many as two full pages displayed simultaneously. Most of today's monitors are capable of displaying VGA and at least one super-VGA resolution, with larger monitors capable of supporting higher resolutions.
Spheroid screens place all points an equal distance from the electron gun.
The tubes are inexpensive, but are difficult to view up close, since the middle of the screen bulges noticeably. These screens are not really flat, but are based on a design that greatly reduces the amount of screen curvature. The cylindrical design shapes the screen as a section of a cylinder. This results in a screen that curves left to right, but does not curve up and down. The advantage of this design is that it tends to have less of a problem with glare, since most light comes from overhead.