FIELD H-I 

 Columns 29, 30, and 31 



FIELD H-2 

 Columns 32, 33, and 34 



GROSS ANATOMICAL STRUCTURE: 

 ORGAN, SYSTEM, BODY AREA 



Organization 



In this area of the CBCC Biology Code, six columns of the IBM punched card (and the Biology 

 Code Sheet) are divided into two fields of three columns each, designated as Field H-l and Field H-2. 

 In the Code, there is a single list of anatomical structures, the symbols of which may be used for 

 coding either field. Due in part to the limitations of space on a single punched card and in part to 

 the complexity of anatomical classification, a single symbol has in some cases been given a definition 

 to include homologies as well as analogies. For example, Symbol B61 can apply to any of the following: 

 arm, wing, pectoral Tin; paw, hand; or any other vertebrate anterior appendage or part thereof; Symbol 512 

 can be used for: spiracle, respiratory pore, or nostril. This presents no difficulty in interpretation, 

 since the organism to which the structure belongs is identified in Field E or Field J. 



The first unit of the three- unit anatomy symbol represents the general system of which the 

 structure is a part. When used alone, this unit represents the complete symbol for the system (e. g. , 

 Symbol 1 in Column 29 or Column 32 represents the nervous system). The second unit represents a 

 subdivision of a system (e. g. , central nervous system, Symbol 15) or it may represent a discrete 

 organ of a system (e. g. , stomach , Symbol 66). The third unit distinguishes the least anatomical 

 structural division of this field, whether it is an organ (e. g. , the spleen , Symbol 342) or whether it 

 is an organ part (e. g. , the stomach cardia , Symbol 662^). 



Subsequent to preparing the initial list for the field, items have been added as they were needed. 

 This is done by simply giving the new item a symbol whose first unit represents the system to which it 

 belongs and whose second and third units are the next available sequential numbers or letters. For 

 example, the symbols for right and left auricles might be expected to be 312 and 313, since the symbol 

 for auricle is 311; however, since these structures were given distinguishing symbols after Symbols 

 312 through 31C had been used, they were assigned Symbols 3 ID and 3 IE. 



The procedure for adding new items to the list may result in the structure being listed distant 

 from structures to which it is most nearly related. (In the example cited above, the right auricle is 

 listed as a distinct item, Symbol 3 ID, 11 items away from auricle, Symbol 311. ) These items are 

 listed again, merely for convenience, with the related structures. (Therefore, Symbols 3 ID and 3 IE 

 will be found between the Symbols 311 and 312, as well as after Symbol 31C. 



Because certain organs, especially specific nerves and blood vessels, form an integral part of 

 organs or systems, other than the system to which they actually belong, they are frequently listed 

 twice, with the organ or system they supply ae well as with the system to which they belong. For 

 example, the optic nerve is listed both with the cranial nerves (symbol series 13) and with the eye 

 structures (symbol series 21), although its symbol is always 133 regardless of where it is listed. 

 Similarly, certain gross organs are constituted of glandular components as well as non-glandular parts. 

 The glandular structure or part of such an organ is assigned a symbol of the C or D series (according 

 to whether it is endocrine or exocrine) and this symbol and structure is listed both with other glandular 

 structures and with the gross organ of which it is a part. (Examples will be found in the reproductive 

 organ list, symbol series 8. ) This double listing is merely for convenience. 



The list is haidly an exhaustive compilation. It might be expanded for special purposes and 

 for data from new areas of investigation. For example, additional items might be needed under the 

 autonomic nervous system and central nervous system for data from investigations on the tranquilizing 

 drugs. 



The 12 zone punch (coded by Symbol *) has been given a special meaning when used in IBM 

 Column 30. (See the following section, General Use. ) For this reason, none of letters A through I 

 can be used for the second unit of symbols in Field H. 



58 - 



