This DB25 to DB9 Serial Adapter converts a 25-pin serial port to a 9 pin male connector. BigCatCables.com has a variety of options available to fit your computer needs.

6 Foot DB9 Female to DB25 Male Null Modem Cable
Sale price$2.99
In stock, 1038 (Including Any/All options)
6 Foot DB25 Male to DB9 Female Serial Cable
Sale price$3.69
In stock, 1239 (Including Any/All options)
10 Foot DB9 Female to DB25 Male Null Modem Cable
Sale price$3.99
In stock, 424 (Including Any/All options)
10 Foot DB25 Male to DB9 Female Serial Cable
Sale price$5.39
In stock, 177 (Including Any/All options)