This book represents an extended and thoroughly revised version of a collection of lecture notes plus practical experiences of the authors. The text is concise and to the point for the medical laboratory practitioners. The book has been written with a view to assist the MLT students at the bachelors' level exam. In Pakistan, standard books are not available for MLT students who are usually burdened by texts intended for the consumption of English speaking students and not really appropriate to the facilities available locally. In addition, many of the laboratory sciences students in Pakistan are not very proficient in English when they start their training programmes. Therefore this book could contribute to fill the gaps and will serve as a platform for other young laboratory science experts to come forward and author similar books in other fields of laboratory sciences.