FIELD A 

 Column 9 



1 1. File of coded biology data on IBM punched cards arranged according to symbols for 

 states of chemical compounds 



The CBCC has established no separate file of coded biology data on IBM punched cards 

 arranged by Field A entries. 



12. Double coding in Field A 



If several tests are run, with the only difference in the tests being the state of the test compound, 

 and the results are so similar that all the tests would be coded identically in every coding field except 

 Field A, the tests are NOT to be all combined into a single code line with all the states used coded 

 (i. e. , double coded) in Field A. The CBCC has refrained from this partly because the double punching 

 of letter symbols and numerical symbols (both of which are in Field A) is not possible (though actually 

 any of Symbols 1-9 could be double coded) and partly because the state is so intimately associated 

 with solvents, carriers, and conditioning agents (i. e. , Fields B and C) that it is improbable that the 

 difference in such tests would involve only Field A, but would also involve Fields B and C. The mechan- 

 ics of double coding all of Fields A, B, and C, therefore, represents more confusion and difficulty than 

 would be justified for those particular coding fields. For these reasons, the CBCC prefers to simplify 

 coding procedure by the policy of never double coding in Field A, even if it makes necessary coding 

 two or more lines for tests identical in results and procedure except for the state of the compound. 

 (Field A can have two entries in the special case of using Symbol with a symbol for the state of the 

 compound, but this does not represent double coding as it is described above. If Symbol is used 

 with another symbol in Column 9, both symbols are punched in that column on a single IBM card). 



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