Consider a large university library. Tens of thousands of books,

periodicals, and other information resources are available for use. But

to access these resources, a categorization scheme must be developed. To

navigate this large volume of information, librarians have defined a

classification scheme that includes a library of congress classification

code, keywords, author names, and other index entries. All enable the

user to find the needed resource quickly and easily.            Now,

consider a large component repository. Tens of thousands of reusable

software components reside in it. But how does a software engineer find

the one she needs? To answer this question, another question arises: How

do we describe software components in unambiguous, classifiable terms?

These are difficult questions, and no definitive answer has yet been

developed.R. S. Pressman. Software Engineering - A Practitioner's Approach, 4 edn, th New York: The McGraw-Hill Companies Inc. 1997, p. 743 (with adaptations).From the text above, it can be concluded that"she" refers to "software engineer".