Ключевые слова: ancient, anemia, background, biology, blood, button, calculation, calculator, cell, corpuscle, count, counter, education, eosinophil, equipment, haematology, hematology, histology, historic, juvenile, laboratory, leukemia, leukocyte, lymphocyte, machine, manual, manual cell counter, medical, medicine, microbiology, microcyte, microscope, monocyte, myelocyte, neutrophil, old, pathology, rbc, red blood cell, retro, routine, science, smear, system, technology, vintage, wbc, white blood cell,