411 REFERENCE · Wiktionary
3-2-1
Reference material by Wiktionary contributors. This retains its source identity and is not 411 news reporting.
3+2+1
English
Alternative forms
en 3+2+1
Adjective
- 1
en relational computing Following the mnemonic "3-2-1 rule" for data archiving and protection: three copies of a piece of data are created, using two different types of media, and one is stored offsite.
en 3-2-1 backup