Vacuum techniques refer to methods used to create and maintain a vacuum, which is a space devoid of matter, including air. These techniques are essential in various fields, such as science, engineering, and manufacturing, where controlled environments are necessary for experiments or processes. Common methods include using vacuum pumps to remove air and sealed chambers to contain the vacuum. In addition to creating vacuums, these techniques also involve measuring and monitoring vacuum levels using devices like vacuum gauges. Applications of vacuum techniques range from semiconductor fabrication to food packaging, where preserving freshness and preventing contamination are crucial.