CD-ROM normally expressed with binary prefixes, subtracting the space used for error correction data. A standard 120 mm, "700 MB" CD-ROM can actually hold about 737 MB (703 MiB) of data with error correction (or 847 MB total). In comparison, a single-layer DVD-ROM can hold 4.7 GB of error-protected data, more than 6 CD-ROMs. CD-ROM discs are read using CD-ROM drives. A CD-ROM drive may be connected to the computer via an IDE (ATA), SCSI, SATA, FireWire, or USB interface or a proprietary interface, such as the Panasonic CD interface, LMSI/Philips, Sony and Mitsumi standards. Virtually all modern CD-ROM drives can
Philips the set was disappearing. Approximately 150 of these sets were eventually produced. In parallel with the generator set Philips developed experimental Stirling engines for a wide variety of applications and continued to work in the field until the late 1970s, though the only commercial success was the 'reversed Stirling engine' cryocooler. However, they filed a large number of patents and amassed a wealth of information, which they later licensed to other companies. The first Philips shaver was introduced in the 1930s, and was simply called Philishave. In the US, it was called Norelco. The Philishave has remained part of the