One of the world's oldest chip makers, Fairchild Semiconductor makes semiconductors for tens of thousands of customers in the automotive, computer, consumer electronics, industrial, mobile, and communications markets. Its diversified product line includes logic chips, discrete power and signal components, optoelectronics, and many types of analog and mixed-signal chips. The company subcontracts a small amount of its fabrication, assembly, and test operations to companies that include TSMC, Amkor, and ASE, among others. In September 2016 the acquisition of Fairchild by On Semiconductor for $2.4 billion was concluded.