Related Clues:
- Keeps posted, in a way
- Certain ER orders
- Includes in an email thread
- 1,000-kilogram units
- Includes, as in Gmail
- Includes, electronically
- Shares written threads with
- Hypodermic needle amts
- Loops into a conversation, briefly
- Keeps in the loop, in emails
- Spreads threads
- Adds to an email chain, in a way
- Decades, with respect to centuries
- 5, in 2.5
- Gas pump fractions