Establishments primarily engaged in packaging, repackaging, and bottling of purchased chemical products, but not engaged in manufacturing chemicals and allied products, are classified in Wholesale or Retail Trade industries.
A phone connector, also known as phone jack, audio jack, headphone jack or jack plug, is a family of electrical connectors typically used for analog audio signals. The phone connector was invented for use in telephone switchboards in the 19th century and is still widely used. The phone connector is cylindrical in shape, with a grooved tip to retain it. In its original audio configuration, it typically has two, three, four and, occasionally, five contacts. Three-contact versions are known as TRS
Audio Cable Setup. For the majority of desktop and tower personal computers, the audio input and output plugs are located in the back of the computer as shown in the image to the right. There are usually three main types of 1/8 inch adapters: Audio output is usually labeled green in color. Make sure this is where your speakers or headphones are plugged in. Microphone input is usually labeled pink in color. If you wish to record using a microphone, make sure it is plugged into this adapter.