Concatenation is a computer programming operation that joins strings together.

Look up concatenation in Wiktionary, the free dictionary.

Concatenation may also refer to:

• Concatenation (architecture), an architectural composition
• Concatenation of paths, a construction in topology
• Non-RAID drive architectures § Concatenation (SPAN, BIG)
• Concatenated SMS, a way of combining multiple SMS text messages sent to cellular phones
• Packet concatenation, a computer networking optimization that coalesces multiple packets under a single header
• cat (Unix), a Unix command to write the contents of one or more files to the standard output
• "Concatenation", the opening track of Swedish extreme metal band Meshuggah's album Chaosphere
• A technical term in Christian liturgy to refer to combining services which are normally performed at different times of the day

• Catenation, the chemical bonding of atoms of the same element into a chain

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