callback; return call
Common in business and customer service contexts for returning a phone call or a follow-up contact.
サポートからコールバックを待っている。
I'm waiting for a callback from support.
product recall
Used for recalling defective products; often appears in news or corporate announcements.
その車のコールバックが発表された。
A recall for that car was announced.
callback function
callback modem
Borrowed from English 'callback'.