ones that supported Cartrivision. Cartrivision-equipped TVs date back before even the introduction of VHS or stand-alone video playback devices in the consumer market (but with the exception of some open reel video playback devices that could be connected to TVs back in the 1960s), which the majority of combo TVs had in the late 1980s and 1990s. Special features During the era of their popularity, many of these units displayed product videos in stores or for other commercial displays. The main reason for this was unlike most low-end, standalone VCRs, many included an automatic rewind feature. After the tape came to an end, the tape would automatically rewind and then play from the beginning of the tape again. This made it useful for product demonstrations to be replayed over and over without an employee continually having to manually rewind the tape. TV/Computer combos Some fully functional computer systems or game consoles have been built into some models of TVs over time. Hewlett-Packard currently has a version of their TouchSmart line of computers with a built-in TV tuner, and even has a built-in DVR; also making it a TV/DVR combo which is a relatively rare concept. As of late 2006, Samsung introduced an LED TV with a proprietary operating system with Internet access to websites like Facebook, YouTube, Hulu, Netflix, and other sites. Other TV/Computer combo equipment can simply just be flatscreen TVs with USB ports which allows USB flash drives and external hard drives to be connected to allow for audio and video playback, in which it can give a streamlined, fully solid-state profile. Almost every modern day TV sets have simplified CPUs and memory chips for basic functions such as channels and video settings, and video timing for LCD flat panels; however these examples are not sophisticated enough to qualify as significant examples. Other computer parts are used for real-time playback of DVDs on combo TVs with DVD player (and Blu-ray Disc for more high-end models) functionality; however these dedicated functions alone don't qualify as significant examples either. In the modern day, the distinction between a combo TV and an all-in-one PC have blurred with the modern smart TV concept. In 2010, Sony introduced a TV with a built-in PlayStation 2. Past In the past, other attempts have been made to integrate computer functionality in CRT or display enclosures. However, prior to the concept of TVs with built-in computer