These mainstream companies, unlike their Silicon Valley counterparts, did not go on manic hiring sprees in the course of the pandemic. The annual revisions are often small — solely about one- or two-tenths of 1 percent of whole nonagricultural employment — although they will occasionally be extra important. The preliminary data released in August, for example, confirmed that the transportation and warehousing industries cut jobs more rapidly than first reported, whereas retail and wholesale firms added jobs extra quickly than believed. Coming into this week, there was a fear that job gains had been narrowing to much less cyclical sectors …