YubiKey Standard
Yubico's first, most cost-efficient and best-selling device offers the "core" set of features which is shared by all the other YubiKeys. The YubiKey Standard fits nicely on a keychain and can be used with many services and any computer with a USB port.
Using Yubico's personalization tools, the YubiKey Standard can be configured for use with Yubico One-Time Password (OTP), OATH-HOTP, HMAC-SHA1 Challenge-Response, and Static Password. The YubiKey Standard can hold two independent configurations of any supported type.
Default Configuration
Slot 1: Yubico OTP
Slot 2: Blank