If the 'or' is to be applied to "knuth" and "donald", one could use:\n
\tfind ti=computer and (au=knuth or donald)\n\n
\tfind computer and s=2\n
If the 'or' is to be applied to "knuth" and "donald", one could use:\n
\tfind ti=computer and (au=knuth or donald)\n\n
\tfind computer and s=2\n