Apart from T & B lymphocytes, the other class of lymphocytes is -
Macrophages
Astrocytes
NK cells
Langerhans cells
Lymphoid cells

The cells of the lymphoid system are lymphocytes.


On the basis of function and surface markers, there are two major types of lymphocytes-


T- cells
B- cells


When circulating lymphocytes are classified by their surface markers into T and B cells, about 5-10 percent of cells are found to lack features of either type they are called null cells/Large granular lymphocytes.
Large granular lymphocytes include:

           - Natural killer cells (N.K Cells)
           - Antibody-dependent cytotoxic cells/killer cells (ADCC).
           - Lymphokine-activated killer cells (LAK cells).