MIDI is an acronym that stands for Musical Instrument Digital Interface. It is a set of standards designed in the mid 1980's to allow different musical instruments (usually keyboards) communicate with one another using digital messages.
The profit an insurance company generates after paying all claims. That is, the underwriting gain is what is left over after the premiums the company collects are added to its investment income and the amount the company pays for claims on its policies is subtracted. An underwriting gain is also called an underwriting profit.
What is underwriting? Not all life insurance policies are underwritten, but because some are it is important to understand what it means. Underwriting is a term used by life insurers to describe the process of assessing risk, ensuring that the cost of the cover is proportionate to the risks faced by the individual concerned. People with the same or similar risk pay the same or similar premium rates.