Carr, Robert. <br/><br/>
The power of penpoint / 
Robert Carr, Dan Shafer. 
 - Reading, Mass. :  Addison-Wesley,  1991. 
 - 342 p. :  ill. ;  24 cm. 
<br/><br/><label>ISBN: </label>0201577631 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Operating systems (Computers).<br/>Penpoint (Computer file).