CSFB may refer to:
- Credit Suisse First Boston, the current (2022-present) and former (1996-2006) investment bank of Credit Suisse.
- College Students for Bernie, a former organization dedicated to increase young voter participation, during Bernie Sanders 2016 presidential campaign.
- Circuit Switch Fall Back (or CS fallback), a feature in LTE telecommunications.
This disambiguation page lists articles associated with the title CSFB.
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