IBM - PC 5140 Convertible - first laptop released by IBM - 1980 IBM PC Convertible is the first laptop released by IBM. Released on April 3, 1986, the Convertible was also the first IBM computer to use the 3½-inch floppy disk format that became the industry standard. Like modern laptops, it featured power management and the ability to run on batteries. It was the sequel to IBM Portable and was the model number 5140. It was replaced in 1991 by IBM PS / 2 L40 SX, and in Japan by IBM Personal System / 55note, which was the predecessor of ThinkPad. The International Business Machines Corporation (commonly known as IBM, and nicknamed "Big Blue"), is an American company, the oldest and among the largest in the world in the IT sector. It produces and markets hardware, computer software, middleware and IT services, offering infrastructures, hosting services, cloud computing, artificial intelligence and consultancy in the IT and strategic sector (e.g. in areas ranging from mainframe computers to nanotechnologies). Issued April 3, 1986; 33 years ago The computer is equipped with two IBM diskettes Made in Japan and the computer parts that can be joined to connect the printer and power supply. Having no necessary tools I could not test whether it works or not, the object is still in good condition. A revision for daily use is recommended. Dimensions: 6.5x43.5x30.5 cm Weight: 6,800 kg Insured PRO shipping We ship using high quality packaging material. We use DHL, UPS or Nexive as a courier. We ask you to sign with reserve otherwise the insurance will NOT respond and we will not be able to refund you the amount paid. In this case, you must notify us within 24 hours of receiving the package.