| Subject | Portuguese | English |
| comp., MS | Secure Multipurpose Internet Mail Extensions | Secure/Multipurpose Internet Mail Extensions (An Internet e-mail security-oriented protocol that adds public key encryption and support for digital signatures to the widely used MIME e-mail protocol) |
| comp., MS, Braz. | S/MIME, Secure/Multipurpose Internet Mail Extensions, extensões S/MIME | Secure/Multipurpose Internet Mail Extensions (An Internet e-mail security-oriented protocol that adds public key encryption and support for digital signatures to the widely used MIME e-mail protocol) |