web, webpage, website, webcast. Write these words as one word, lowercase.
Years. Use the four-digit year (e.g., 2015), not just two digits. When referring to a decade or century never use an apostrophe after the year:
Correct: In the 1980s, policymakers…
Incorrect: In the 1980’s, policymakers…
Or, you can spell out decades:
In the eighties, policymakers…
When referring to a century, use numerals. Do not capitalize the word “century”:
The economic challenges of the 21st century
Young Scholars Initiative (YSI). Spell out with initial caps on first reference. Use YSI thereafter.