First generation: 2011

The Samsung Notebook Series 9 (known as SENS Series 9 in South Korea) was introduced on January 6, 2011 at the Consumer Electronics Show (CES) and won the Best of CES award in the Laptop category.^[3] It featured the world's first enclosure that is made out of aerospace grade duralumin^[4] with 16.3 mm (0.64 in) thickness and 1.31 kg (2.89 lb) in weight; it had a Sandy Bridge Intel Core i5 processor, 128GB^{[note 1]} solid-state drive (SSD) and a 13.3" HD (1366 x 768) display with 300 nit of brightness. The Series 9 notebook went on sale in South Korea in February 2011 for a price of 24,90,000 won, and launched in March globally.^[1]

On May 4, 2011, Samsung also introduced 11.6" display version of the Series 9 in the Korean market and later abroad.^[5] It had the same design identity, specification and exterior material as the 13.3" model except the display size and CPU of Intel Core i3-380UM. The thickness remained the same but the weight was lighter at 1.06 kg (2.34 lb). Two months later, an updated CPU version with Intel Core i5-2537M was introduced to the Korean market to test the market perception of a smaller screen laptop. The original intention was to compete against MacBook Air line up with same screen size models, but due to sluggish demand of smaller screen size model, the 11-inch model was ceased by the end of the year. Newly developed 15-inch model superseded the 11-inch model in order to meet the larger-screen preference of the Korean market and later, it was introduced worldwide.

A special edition was also released later: Moonlight Blue and Luxury Rose Gold.^[6]

Second generation: 2012

The second generation Notebook Series 9 was announced to the public at the CES on January 8, 2012.^[7] The new model had same display size of 13.3" but the resolution was stepped up from HD (1366 x 768) to HD+ (1600 x 900) and the brightness was increased from 300 nit to 400 nit. Design was refined with a reduced footprint and a different hinge design consisting of two hinges left and right. Also the material of the enclosure was changed from duralumin to aluminium single-shell body. Subsequently, the weight was reduced from 1.31 kg (2.89 lb) to 1.13 kg (2.49 lb) and the thickness was reduced from 16.3 mm (0.64 in) to 12.9 mm (0.51 in).^[8]

The user was offered a choice of 128GB SSD as well as larger 256GB SSD for the storage. It was introduced with Sandy Bridge Intel Core i5 processor at the CE Show but 3 months later, it was upgraded to the Ivy Bridge Intel Core i5 processor before the hitting the market. Despite its design fitting well in Intel's Ultrabook category, Samsung chose not to market the Series 9 notebook as an Ultrabook.^[9]

In March 2012, the 15.0" display version of the Series 9 was announced to the market with HD+ resolution display. It had same specification as its 13.3" counterpart but introduced to the market with Ivy Bridge Intel Core i5 processor from the beginning. The Magnesium enclosure version was also introduced in July 2012.^[10]

Third generation: 2013 Book 9, Plus, Lite

At CES 2013, a white Series 9 was presented but without further details (whilst the Series 7 Chronos and Ultra were updated with full HD screens).^[11] Eventually on March 28, 2013, the new Series 9 was announced with its 13.3" displays upgraded from HD+ to FHD (1920 x 1080).^[12] Around the same time, Samsung decided to rebrand all of its computer lines to ATIV and consequently, Series 9 became ATIV Book 9.^[13]

On June 20, 2013, during the "Samsung Premiere 2013: Galaxy & ATIV"^[14] event in London, ATIV Book 9 Plus and ATIV Book 9 Lite was introduced to public. Book 9 Plus featured Haswell Intel Core i5 processor and 13.3" qHD+ (3200 x 1800) resolution display with touchscreen panel. Although it was equipped with qHD+ display, initial advertisement showed it as having FHD resolution display due to lack of qHD+ driver support of Windows 8. This issue has been resolved with the arrival of Windows 8.1 and all Book 9 Plus models had the option to choose qHD+ resolution once 8.1 was installed even though the previous advertisement showed FHD in its specification.

Meanwhile, the Book 9 Lite has a plastic enclosure but it still retains the "Thin & Light" design identity of Book 9 family. It is equipped with AMD quad-core A6-1450 APU with Radeon HD8250 GPU and HD resolution 13.3" display.^[15][16][17] The performance of the APU was relatively low but the overall speed was compensated by the SSD. It was marketed toward casual computer users who mainly use the device for web browsing and email checking, not computation-intensive application users.

2014 Edition

On January 7, 2014, Samsung Electronics announced the new ATIV Book 9 2014 Edition at CES 2014.^[18] The screen size was increased from 15.0" to 15.6" from the previous 15 inch Book 9 and the resolution was upgraded from HD to FHD as well. It was announced as the world's first laptop PC to have native lossless audio up to 24bit/192 kHz, such as FLAC and ALAC, playback feature.^[18] Due to 48 kHz audio playback limitation of the Windows operating system, a dedicated lossless audio player software, S Player+, was also developed and shipped with the product. It also marketed as having the longest battery running time of 14 hours in 15-inch class laptop computers.^[19]

Two months later, ATIV Book 9 Style, another 15 inch Book 9, was announced. It had a similar design and specification as Book 9 2014 Edition, except having plastic enclosure and lack of lossless sound playback feature. However, it was equipped with two powerful speakers with 4W of output each. Also the exterior has leather-like texture finish with faux stitch design on the edge of the computer.^[20][21]

All the new Book 9 models that were announced in 2014 include new features such as high current USB port for tablet charging, AptX codec for high quality audio transmission over Bluetooth, Dolby Virtual 5.1 surround sound effect and remote controllable audio port. The 2014 Edition Book 9 was the last in the series to be released in Europe, following Samsung's late 2014 announcement that it is exiting that market.^[22]

2015: fanless Book 9

This section needs expansion. You can help by adding to it. (October 2023)

The new ATIV Book 9 announced in January 2015 switched to a low-power Intel Core M 5Y10c processor, allowing it to be fanless, and slimmer and lighter than before.^[23] It was 0.46 inches thin and weighed 2.06 lbs. This new model featured a smaller, 12-inch display and WQXGA (2560x1600) resolution.^[24] It ran on Windows 8.1 and included the typical Samsung bundled applications like SideSync, S Agent and S Player.^[25]

2016: Notebook 9, Spin, Pro

At the end of 2015, the ATIV Book 9 Pro and Book 9 Spin were introduced^[26] (also known as Samsung Notebook 9 in some regions),^[27][28][29] both running on an Intel Core i7 processor. The Notebook 9 Pro features a 4K resolution display, while the Notebook 9 Spin is a 360-degree convertible.^[30] Then at CES 2016, the Samsung Notebook 9 was introduced.^[31] The 13.3-inch version of Notebook 9 weighs 0.84 kg and the 15-inch version weighs 1.29 kg. Both feature a Skylake (6th generation) Intel Core processor,^[32] marking a departure from the Core M used in 2015's ATIV Book 9. The 15-inch version also features a USB-C port.^[32]

2017 and later: Notebook 9, Pen, Pro

The 2017 edition of Samsung Notebook 9 came with a Kaby Lake (7th generation) Intel Core processor.^[33] The computer was claimed by the company to be the world's lightest 13-inch laptop at just 1.8 lbs / 820 g.^[34] Despite its size, it retains a full size HDMI port. The 15-inch variant came an Nvidia GTX 940MX graphics chip.^[34]

Also in 2017, a new Notebook 9 Pro was released, also running on 7th generation Intel Core and bundled with an S Pen.^[35]

In 2018 another new Notebook 9 was released running on 8th generation Intel Core, alongside the Notebook 9 Pen compatible with the S Pen.^[36] Both these 2018 Notebook 9 models are made of magnesium-aluminum alloy ("Metal12"), which Samsung also claimed makes it more durable than its predecessors.^[37][38]

2019 editions of Notebook 9 Pen were released in 13" and 15" forms,^[36] and a new Notebook 9 Pro was also launched,^[39] with a revised aluminium body^[40] Later in 2019, Samsung introduced the Galaxy Book Flex and Galaxy Book Ion, effectively the successors of Notebook 9 Pen^[41] and Notebook 9 Pro respectively. These models were released in 2020 and also marked Samsung's return to selected European markets.^[42]

13-inch models

11-inch, 12-inch and 15-inch models