Williams, Brian K., <br/><br/>
Using information technology : a practical introduction to computers and communications  
Brian K. Williams, Stacey C. Sawyer, Sarah E. Hutchinson. 
 - 3rd ed. 
 - Boston :  Irwin/McGraw-Hill,  1999. 
 - 610 p. :  ill. 
<br/><br/> Includes index. 
<br/><br/><label>ISBN: </label>0256261466 (International Ed.) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Computers.<br/>Telecommunication systems.<br/>Information technology.