What does pm mean?

1, PM, the abbreviation of ProjectManager, is the project supervisor or project manager, who is mainly responsible for the overall planning of project schedule and product life, and the work function is directly responsible to the company's senior management. As a project manager, the project manager usually participates in the management and decision-making of one or more projects.

2.PM, short for Latin postmeridiem, means afternoon, and is used for twelve-hour clock. "Afternoon" refers to the period from 12: 00: 00 to 23: 59: 59 every day.

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PM is also a symbol of chemical elements, named promethium, which is pronounced in Pinyin [pǒ] and is one of the rare earth elements.

Promethium, with element symbol Pm and atomic number 6 1, is one of the radioactive lanthanide rare earth elements. There are 17 isotopes and 4 isoforms known. The most important is 146Nd PM extracted from uranium fission products or irradiated with neutrons (half-life is 2.64 years).