To identify the differential count of WBC. Just memorized according to number of lobe present in the cell.
1. Neutrophil (Multi Lobed)
2. Lymphocyte (Single rounded Nucleus )
3. Monocyte (Kidney Shaped;Mono=Single Lobe) 4. Eosinophil( 2 lobes; Telephone shaped) 5. Basophil(No cytoplasm;Basophil is generally absent,so you don't need to identify it)