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Welcome to ITSMARC by TLC, a leader in metadata since 1974


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What is ITSMARC?

ITSMARC is TLC's online copy cataloging resource providing access to 85 million records. It delivers two types of MARC records: bibliographic and authority. Most people think of ITSMARC as a source of bibliographic metadata but there are also LC, Sears and MeSH authority records available.


ITSMARC Databases

ITSMARC draws its MARC records from 23 separate databases. Click on the links to the left to get a brief description. Select Contents from the description display for more details.

Database Counts as of 9/4/2025
1,948,090

17,996,616

4,035,317

1,692,234

2,531,124

6,215,223

1,642,705

1,099,015

361,724

2,022,268

5,796,482

6,271,077

6,552,808

852,362

1,298,799

661,133

10,774,282

12,472,681

224,151

645,666

151,621

9,089

1,215,969

Total:
86,470,436

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