Illumina, MGI, and Oxford Nanopore are all companies that manufacture next-generation sequencing (NGS) machines. These machines are used to sequence DNA and RNA, which allows researchers to study genetic variation and gene expression.

Illumina is a leading manufacturer of NGS machines and offers a range of instruments for a variety of applications, including whole genome sequencing, exome sequencing, and targeted sequencing. The company's machines are known for their high throughput, accuracy, and scalability.

MGI is a Chinese company that also manufactures NGS machines. The company's instruments are known for their high speed and accuracy, and they offer a range of options for whole genome sequencing, exome sequencing, and transcriptome analysis.

Oxford Nanopore is a British company that has developed a unique approach to DNA sequencing using nanopore technology. The company's portable sequencers, such as the MinION and GridION, offer high-throughput, low-cost sequencing options that can be used in a variety of settings, including fieldwork and resource-limited environments.

Other companies that manufacture NGS machines include Thermo Fisher Scientific, Pacific Biosciences, and BGI. Each of these companies offers a range of instruments with different capabilities and features, so it's important to carefully consider your specific needs when choosing an NGS machine.