Data in computer terminology mean raw facts and figures. A data is taken as an input with a set of instructions(given by the user) and then processed into information. For example, 'James', '1977', 'A', '-167.45', '+765', etc. A more sober definition of data is that it is the set of qualitative and quantitative variables. Data can be represented in a structure that is tabular(rows and columns), a tree(nodes, branches, etc) or a graph.