1. state transition diagram.

2. Internet standard.

A subseries of Request For Comments (RFC) that specify Internet standards. The official list of Internet standards is STD 1.

See also For Your Information.

rfc.net.

1. A disease, such as genital herpes, gonorrhea, or chlamydia, whose usual means of transmission is by sexual contact.
2. A disease that is transmitted during sexual intercourse (anal, oral, or vaginal). Such diseases include:
   • AIDS (HIV)
   • chlamydia
   • genital herpes
   • genital warts (HPV)
   • gonorrhea
   • hepatitis B
   • crab lice
   • syphilis
   • trichomoniasis