. 2012 Jun 17;94(2):589–593. doi: 10.1007/s11192-012-0784-8

Table 1.

Changes in the organization of subject categories and subject areas between versions 4 and 5 of WoS

	WoS version 4	WoS version 5
Subject categories (SCI + SoSCI)	222 ISI subject categories^a	225 WoS subject categories
Abbreviation in the download	SC	WC
A&HCI	25 ISI subject categories	26 WoS subject categories
Subject areas	<not defined>	151 subject areas; abbreviated SC in the download

One of the 225 WC is no longer in use; this is: “Biology, Miscellaneous”. Only a single journal (Growth Development and Aging) is attributed to this category. Although this journal was cited 520 times in 2010 and is listed with an IF-2010 = 3.000, it is not processed in the Journal Citation Reports (JCR) from the citing side. In summary, we use the matrix of 224 WCs

^aThree additional categories were no longer in use (Rafols and Leydesdorff 2009)