The following typographic conventions are used in this cookbook.
Anything that is to be typed into a computer program via the keyboard, or output from one via the screen, is indicated by a `typewriter' font like this.
Lines that are to be typed into the computer are shown beginning with a % sign, for example:
The % indicates the Unix `shell prompt' and should not be typed in. However:
items appearing in graphical windows, such as those used by GAIA or xcatview, are shown in a sans serif font like this.
items of particular importance are shown in bold and indented paragraphs like this one.
Asides and points of interest are usually shown as footnotes.
The CCD Photometric Calibration Cookbook