The book consists of testing of internal combustion engine with measurements of various parameters using computer. For this the data is acquired from internal combustion engine and send to computer after required conditioning. The data acquisition system increases efficiency of measurement and lowers the cost for test. The purpose of the data acquisition system is generally the analysis of the data and the improvement in accuracy of measurements. This book involves testing of internal combustion engine using data acquisition system . For this the data is acquired from internal combustion engine and send to computer after required conditioning. This book emphasizes on the measurements of Speed , Load & Temperature, Vibrations using Software like Visual Basic , Hardware PCI 1050 Card with Signal Conditioning using INA128 IC and Sensors like Proximity Sensor, Load Cell and RTD .This book should be useful to the research scholars, graduate and post graduate engineers and especially the professionals working in automobile sector or in the field of instrumentation to learn more about the Data Acquisition.