The font selected by \
mathcal
is the only script font 'built
in'. However, there are other useful calligraphic fonts included with
modern TeX distributions.
\
mathcal
.
Type 1 versions of the fonts are available in the AMS fonts distribution.
\
mathscr
.
Type 1 versions of the font have been made available by Taco Hoekwater.
\DeclareMathAlphabet{\mathscr}{OT1}{pzc}% {m}{it}in your preamble. You may find the font rather too big; if so, you can use a scaled version of it like this:
\DeclareFontFamily{OT1}{pzc}{} \DeclareFontShape{OT1}{pzc}{m}{it}% {<-> s * [0.900] pzcmi7t}{} \DeclareMathAlphabet{\mathscr}{OT1}{pzc}% {m}{it}
Adobe Zapf Chancery (which the above examples use) is distributed in any but the most basic PostScript printers. A substantially identical font (to the the extent that the same metrics may be used) is available from URW and is distributed with ghostscript.
This question on the Web: http://www.tex.ac.uk/cgi-bin/texfaq2html?label=scriptfonts