CD-ROM XA (Compact Disc - read-only-memory, extended architecture) is a modification of CD-ROM that defines two new types of sectors that enable it to read and display data, graphics, video, and audio at the same time. 

CD-RW (for compact disc, rewriteable) is a compact disc (CD) format that allows repeated recording on a discs.

Certified Decision Management Architect (CDA) by Pegasystems

Certified DIACAP Assurance Engineer (CDAE) by Information Assurance Certification Review Board

Certified Data Centre Audit Professional (CDCAP) by CNet Training

Certified Data Centre Design Professional (CDCDP) by CNet Training

Certified Data Centre Expert (CDCEMC) by EXIN

Certified Data Centre Energy Professional (CDCEP) by CNet Training

Certified Data Centre Management Professional (CDCMP) by CNet Training

Certified Data Centre Professional (CDCP) by EXIN

Certified Data Centre Specialist (CDCS) by EXIN

Certified Data Centre Technician Professional (CDCTP) by CNet Training

A standard for data transmission based on FDDI (Fiber Distributed Data Interface) that uses shielded twisted-pair (STP) or unshielded twisted pair (UTP) copper wire instead of fiber optic lines. 

Skill Level: Foundation Status: ActiveFor individuals who want to pursue any corrective action, arthritis litigation or proof of guilt based on digital evidence. The CDFE program is designed for Cyber Crime Investigators who use electronic discovery and advanced investigation techniques.

Certified Data Centre Facilities Operations Manager (CDFOM) by EXIN

Skill Level: Foundation Status: ActiveFor individuals who deliver document imaging solutions. The CDIA+ certification proves expertise in the technologies and best practices used to plan, pharmacy ed design, and specify a document imaging, management system.