Philips CD-i console, also known as Green Book, which was co-developed by Philips and Sony. In addition to games, educational and multimedia reference titles were produced, such as interactive encyclopedias and museum tours, which were popular before public Internet access was widespread. The CD-i was also one of the earliest game systems to implement Internet features, including subscriptions, web browsing, downloading, e-mail, and online play. This was facilitated by the use of an additional hardware modem and "CD-Online" disc (renamed Web-i in the US), which Philips initially released in Britain in 1995 for $150 US. Development of the CD-i format began in
Philips Records the Philips Recording Center in Baarn, Netherlands, and formed Polyhymnia International (a recording and mastering company) and Pentatone Records (which specializes in SACD releases). Many of the Philips classical recordings have been reissued on the Eloquence label. Universal also released a "Philips 50" series marking the 50th anniversary of Philips Records in the early 2000s; some of those CDs are still in print. Pentatone has released Philips Quadraphonic sound recordings from the early and mid-1970s in 4-channel SACD format, as their RQR Series. Philips' classical catalog was issued on CD under the headings "Digital Classics", "Legendary Classics" and "Silver Line