Oceanographic Engineering Corporation 



4930 Naples Place 



San Diego 10, California 



Ocean Research Equipment, Inc. 

 Vineyard Haven, Massachusetts 



Olin Mathieson Chemical Corporation 

 Government Service - Chemicals Div. 

 1730 K Street NW 

 Washington 6, D. C. 



Olympic Instruments, Inc. 

 Department 66 

 Vashon, Washington 



Omnitronics, Inc. 

 Subsidiary of Borg-Warner Corp. 

 511 North Broad Street 

 Philadelphia 23, Pennsylvania 



Operations Research, Inc. 

 8605 Cameron Street 

 Silver Spring, Maryland 



Orbit Industries, Inc. 

 213 Mill Street N. E. 

 P. O. Box 278 

 Vienna, Virginia 

 Attn: R. F. Pontzer 



Penton Publishing Company 

 National Press Building 

 Washington 4, D. C. 



Pergamon Press, Inc. 

 Symposium Publications Division 

 122 East 55th Street 

 New York 22, New York 



The Perkin-Elmer Corporation 

 1625 I Street NW 

 Washington, D. C. 



Philco Corporation 

 Scientific Laboratory 

 Blue Bell, Pennsylvania 



Philco Corporation 



C & W Division 



4700 Wissahickon Avenue 



Philadelphia 44, Pennsylvania 



Attn: Mr. Bollinger 



Philco Corporation 

 Government & Industry Group 

 808 - 17th Street NW 

 Washington 6, D. C. 



Piper Aircraft Corporation 

 Lock Haven, Pennsylvania 



Otis Elevator Company 

 Defense & Industrial Division 

 35 Ryerson Street 

 Brooklyn 5, New York 



Otis Engineering Corporation 

 Box 14416 

 Dallas 35, Texas 



PneumoDynamics Corporation 

 1301 E. El Segundo Boulevard 

 El Segundo, California 



PneumoDynamics Corporation 

 Systems Engineering Division 

 4936 Fairmont Avenue 

 Bethesda 14, Maryland 



Pacific Automation Products, Inc. 

 1200 Air Way 

 Glendale 1, California 

 Attn: J. D. Duff 



Pacific Fisherman 

 71 Columbia Street 

 Seattle 4, Washington 



PneumoDynamics Corporation 

 One Farragut Square South 

 Washington 6, D. C. 



Polarad Electronics Corporation 

 43-20 Thirty-fourth Street 

 Long Island City 1, New York 

 Attn H. Zimmerman 



Packard Electric Company 

 General Motors Corporation 

 Warren, Ohio 



Popular Mechanics 



1224 National Press Building 



Washington, D. C. 



Pan American Petroleum Corporation 

 P. O. Box 591 

 Tulsa, Oklahoma 



Power Instruments Corporation 



235 Oregon Street 



El Segundo, California 



300 



