This document discusses hydraulic machines and presents a student project on a hydraulic pick and place machine. It provides background on hydraulics, explaining that hydraulics deals with mechanical properties of fluids and is used for generating, controlling, and transmitting fluids to produce mechanical work. The basic laws of hydraulics like Pascal's law and relationships between pressure, force and area are then outlined. The document proceeds to describe the students' hydraulic pick and place machine project, which uses syringes as actuators and switches to achieve various motions through water transmission. It details the working mechanism involving different syringe pairs and discusses advantages like many industrial uses and simplicity, as well as disadvantages like needing mechanical input.