1. Raster scan

2. Random scan

1. Raster system produces jagged lines that are plotted as discrete point sets.

1. Random system produces smooth line drawings because the CRT beam follows the line path directly.

2. It is less expensive.

2. It is more expensive.

3. Modification is difficult.

3. Modification is easy

4. Its resolution low because picture definition is stored as a set of intensity value for all screen points.

4. Its resolution is high because pictures definition is stored as a set of line drawing instruction.

5. Solid pattern is easy to fill.

5. Solid pattern is difficult to fill.

6. It is suitable for realistic display and well suited for displaying shading and colour areas.

6. It is suitable for engineering and scientific drawings. It is only restricted to line drawing applications.

7. Shadow mark technology is used.

7. Beam penetration technology is used.

8. Refresh rate do not depend on picture complexity.

8. Refresh rate depends directly on picture complexity.

9. Image is displayed by scanning the whole area.

9. Image is displayed by steering the beam along the vectors.

10. It uses interlacing.

10. It does not use interlacing.

11. The refresh rate is independent of picture complexity.

11. The refresh rate depends directly on picture complexity.

12. It uses shadow mask method.

12. It is use beam penetration method.