An hour is correct, because "hour" begins with a vowel sound. A vs. an depends on pronunciation, not spelling.

Some notable cases:

• A/an NIC (network interface card)--proper spelling depends on prounuciation... "A nick" vs. "an N-I-C"
• A/an herb. "An erb" in most regions. "a herb" (with pronounced H) in some

An hour is correct, because "hour" begins with a vowel sound. A vs. an depends on pronunciation, not spelling.

Some notable cases:

• A/an NIC (network interface card)--proper spelling depends on prounuciation... "A nick" vs. "an N-I-C"
• A/an herb. "An erb" in many cases/regions. "a herb" (with pronounced H) in some

*An hour is correct, because "hour" begins with a vowel sound. A vs. An depends on pronunciation, not spelling.

Some notable cases:

• A/an NIC (network interface card)--proper spelling depends on prounuciation... A "nick" vs. "an N-I-C"
• A/an herb. "An erb" in most regions. "a herb" (with pronounced H) in some

An hour is correct, because "hour" begins with a vowel sound. A vs. an depends on pronunciation, not spelling.

Some notable cases:

• A/an NIC (network interface card)--proper spelling depends on prounuciation... "A nick" vs. "an N-I-C"
• A/an herb. "An erb" in most regions. "a herb" (with pronounced H) in some