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Blockchain, a digital ledger system, uses sophisticated cryptographic techniques to create a permanent, unchangeable and transparent record of exchanges to keep track of transactions.
Board policy: Investors are pushing for an independent chair of Amazon’s board of directors who has never served as an executive of the company. The resolution’s goal is to wrestle some control of the company from Jeff Bezos, who currently serves as CEO and board chair.
Boosted by gains in industrial shares following reports of renewed trade negotiations, both the S&P 500 and the Dow Jones Industrial Average posted their biggest monthly percentage gains since January, when markets hit peak levels, Reuters reported.
Boeing halted MAX deliveries in March after the second of two crashes that together killed 346 people.
Boeing has said flight simulator training is not necessary for the 737 MAX and federal regulators do not require it. Nevertheless, some airlines purchased flight simulators, land-based versions of a cockpit that replicates flying complete with hydraulics to mimic the aircraft's pitch and roll under specific conditions.
来源：资阳报