History of botany scope of the subject as technology has opened up new techniques and areas of study. Modern molecular systematics, for example, entails the principles and techniques of taxonomy, molecular biology, computer science and more. Within botany there are a number of sub-disciplines that focus on particular plant groups, each with their own range of related studies (anatomy, morphology etc.). Included here are: phycology (algae), pteridology (ferns), bryology (mosses and liverworts) and palaeobotany (fossil plants) and their histories are treated elsewhere (see side bar). To this list can be added mycology, the study of fungi, which were once treated as plants, but
Biology of the Cell was later retitled "Biologie Cellulaire" (; 1977–1980), becoming "Biology of the Cell" in 1981. Articles were originally published in either English or French, with summaries in both languages. Content from 1988 is available online in PDF format, with papers from 2005 also being available in HTML, and from 2006 in an enhanced full-text format. The journal's 2014 impact factor was 3.506. "Biology of the Cell" is indexed by BIOBASE, BIOSIS, CAB International, Cambridge Scientific Abstracts, Chemical Abstracts Service, Current Contents/Life Sciences, EMBASE/Excerpta Medica, MEDLINE/Index Medicus, and ProQuest Information and Learning Articles are primarily research and reviews. Themed series on specific