<p class="p1">This investigation shows that search keys derived from personal a<span class="s1">u</span>thor names possess a sufficient degree of distinctness to be employed in an <span class="s2">effi</span>cient computerized interactive index to a <span class="s3">file </span>of MARC II catalog record<span class="s1">s </span>having 167,745 personal author entries.</p>

<p class="p1">Development and <span class="s1">implementation of </span>an off-line <span class="s1">catalog card </span>production <span class="s1">system </span>and <span class="s1">an </span>on-lin<span class="s2">e </span><span class="s1">shared cataloging </span>syst<span class="s2">e</span>m are described. In off-lin<span class="s2">e </span>production<span class="s2">, </span>average <span class="s1">cost </span>p<span class="s2">e</span>r <span class="s1">card </span>for 529<span class="s2">,8</span>93 <span class="s1">catalog </span>cards <span class="s1">in </span>finished form and alphabetized for filing was 6.57 cents. An account is <span class="s1">given </span>of <span class="s1">system </span>design <span class="s1">and equipment </span>selection for the on-line system<span class="s3">. </span>File organization <span class="s1">and </span>pro<span class="s2">gra</span>ms <span class="s1">are </span>described, <span class="s1">and </span>the on-line <span class="s1">cataloging system </span>is discussed. The system <span class="s4">is </span><span class="s2">eas</span><span class="s4">y to use</span><span class="s2">, </span>efficient, reliable, <span class="s4">and </span>cost <span class="s4">beneficial.</span></p>

<p class="p1">An experiment was conducted to design a corporate author index to a large bibliographic file. The nature of corporate entries necessitates a different search key construction from that of personal names or <span class="s1">titles. </span>Derivation of a search key to <span class="s1">select </span>distinct corporate entry records <span class="s2">is </span>discussed<span class="s3">.</span></p>