International Business Machines Corp., the largest computer-services provider, plans to sell two-part benchmark bonds in its second offering this year.

IBM may issue three- and seven-year notes as soon as today, according to a person familiar with the transaction. The bonds may be rated Aa3 by Moody’s Investors Service with proceeds for general corporate purposes.

The company last sold debt in February, issuing $1 billion each of two-year floating-rate notes that paid 2 basis points less than the London interbank offered rate and 1.25 percent, five-year securities that yielded 47 basis points more than similar-maturity Treasurys, according to data compiled by Bloomberg. The notes due February 2018 traded at a high of 101.863 cents on the dollar to yield 0.85 percent on April 30, according to Trace, the bond-price reporting system of the Financial Industry Regulatory Authority.

Bank of America Corp., BNP Paribas SA, Royal Bank of Scotland Group Plc and Wells Fargo & Co. are managing the offering for the Armonk, New York-based company, said the person, who asked not to be identified because terms aren’t set. Benchmark sales are typically at least $500 million.