The PlayStation (PS1) was a home video game console developed and marketed by Sony Computer Entertainment. After the collapse of the joint-Nintendo project, Sony briefly considered allying itself with Sega to produce a stand-alone console but that failed as well. Hence, having manufacturing and scaling expertise, their first console was initially released 1994 and had tremendous success throughout its lifespan. Its focus was on 3D polygon graphics and utilizing CD-ROM technology instead of other much smaller capacity cartridges.
The PS2 was the successor to the very successful original PlayStation home video game console. It was initially released in 2000 and competed with Sega's Dreamcast, Nintendo's GameCube and Microsoft's Xbox in the sixth generation of video game consoles.
At launch, it offered backwards compatibility for its predecessor's games and DualShock controller, included CD/DVD reader for broader functionalities. In the long-run, it became the best-selling video game console of all time.
The PS3 was a home video game console and the successor to the very successful PlayStation 2. It was initially released in 2006 and competed mainly against consoles such as Microsoft's Xbox 360 and Nintendo's Wii as part of the seventh generation of video game consoles.
During its early years, the system received negative reception due to its complex Cell microprocessor architecture and lack of excellent games. That said, it was praised for its Blu-ray capabilities and CPU computational potential. They released multiple version (Slim model & Super Slim model) with mixed reception since they were cutting core features as well. Overtime, the reception would improve but it didn't manage to have the same impact its predecessor.
The PlayStation 4 was initially released 2014 and competed with Microsoft's Xbox One, Nintendo's Wii U and Switch. The console featured a easier to develop on AMD Accelerated Processing Unit (APU) built upon the x86-64 architecture, while supporting HDR10 High-dynamic-range video and playback of 4K resolution multimedia. It later launched a Pro version which advertised being capable of rendering games at 4k.
The console was released with much acclaim for not imposing their vision on consumer needs, embracing small-sized independent game developers and for not imposing restrictive schemes in contrast to the Xbox One. It had a lot of success and was considered the best-seller of its generation.
The PlayStation Portable (PSP) was a handheld gaming console device developed by Sony Computer Entertainment and initially released in 2004. It was the most powerful portable console at launch with high-end graphics, multimedia capabilities, wireless connectivity, and much more. It was the first real competitor to Nintendo's handheld domination, though even if the portable console managed to gain much attraction, it never surpassed the dominance of Nintendo in the portable gaming industry. It did get several revision throughout its life cycle (PSP, PSP Go, PSP Street).
The PlayStation Vita was a handheld game console developed by Sony Computer Entertainment and released in 2011. The original model included an OLED multi-touch capacitive touchscreen, two analog joysticks, front and shoulder push-button input, and supports Bluetooth, Wi-Fi and optional 3G. The portable device emphasized a high-end gamer centrique design to counter the growing market share of mobile gaming devices like smartphones and tablets. Sony also promoted its ability to work in conjunction with the PlayStation 4 to play its games on the portable device via Remote Play. Ultimately, the device did sell well but never reached critical mass.