The acronym VARK stands for Visual, Aural, Read/write, and Kinesthetic sensory modalities that are used for learning information. Fleming and Mills (1992) suggested four modalities that seemed to reflect the experiences of the students and teachers. Although there is some overlap between them they are defined as follows. [For a detailed description of the initial construction and limitations of VARK, and for other works on learning styles, see the bibliography and the seminal article.]
Remember life (and work) are multimodal so there are no hard and fast boundaries.