[3] The company was a major manufacturer of PCs until a decline in fortunes led to Toshiba selling the business to Sharp in 2018, with new products since rebranded to Dynabook worldwide.

Toshiba worked with researchers at the University of Tokyo and manufactured a vacuum-tube computer called TAC, containing 7,000 tubes and 3,000 diodes.

[12] In 1981, Toshiba released the first in a line of home computers under the Pasopia name, which run on a BASIC based operating system.

[15] The first Toshiba computer with the name DynaBook was announced on June 26, 1989,[14] released in Japan (model number J-3100 SS001[16]) featuring a 3.5 inch disk drive and full sized keyboard, weighing five pounds.

[17] Its compact size (then the original definition for a 'notebook laptop'), combined with its low price, made it a major hit in the country, and led to Toshiba adopting the DynaBook brand name for most of its future notebooks sold domestically.

[14] The DynaBook along with NEC's 98 Note together accounted for the "vast majority" of notebook computer sales in Japan in the year 1990.

[22] The following year, EZ486P with a i486SX chip and featuring a built-in printer was released and achieved 3 million sales worldwide.

[29] The same year the company also released its first Libretto, a subnotebook or handheld computer running Windows 95.

[34] In September 2006, Toshiba recalled thousands of batteries, supplied by Sony, shipped with some of its laptops as they could lose power.

[39] In April 2011, Toshiba announced the DynaBook Qosmio T851/D8CR, described as "the world's first glasses-free 3D notebook PC able to display 3D and 2D content at the same time on one screen".

[41] In 2013, Toshiba released the Kirabook (Dynabook Kira in Japan), a high-end Windows 8 notebook.

[50] Toshiba remained one of the largest vendors in the market during the 2000s, and as of 2011 the company was selling 17.7 million PCs.

[51] With Toshiba in trouble amid an accounting scandal and under pressure to cut costs, it sold the majority of its PC business to Sharp Corporation.

[57] As of FY 2022, Dynabook is the fifth largest PC vendor in Japan with a market share of 8%, trailing FCCL (Fujitsu), Dell, HP, and the leader NEC-Lenovo Group.

[58] In February 2024, Dynabook announced a recall of millions of AC adapters shipped with Toshiba notebooks from 2008 to 2012 due to burn and fire hazards, offering to replace them for free.