Rating classes vary by company, but all companies use the same basic convention, as illustrated by the following table. (quickquote.com)
Working with a smooth, precise touch on square or nearly square medium - size canvases, he systematically plays with basic conventions of Modernist design to optically invigorating and subtly comical effect. (nytimes.com)
Gaining familiarity with basic conventions in writing — spelling, grammar and punctuation — as part of the writing process in turn helps students become stronger independent readers. (bookpunch.com)