Updated: 02/01/2021 by Computer Hope

Started by Herman Hollerith as the Tabulating Machine Company in 1896 and later Incorporated on June 16, 1911, in the state of New York as the C-T-R (Computing-Tabulating-Recording Company). C-T-R was a consolidation of the Computing Scale Company and The International Time Recording Company. In 1924, C-T-R adopted the name IBM (International Business Machines).

IBM was first known for making clocks and time keeping and recording systems, eventually selling their time equipment division to Simplex Time Recorder Company in 1958.

Today, IBM is one of the most well-known and successful computer companies in the world and is sometimes referred to as Big Blue.


Anyone who has worked at IBM is known as an IBMer.

Contact information


Today, IBM is the manufacturer and developer of various computers, hardware products, software products, and services. If your computer is IBM compatible, it is likely a Lenovo or PC clone and not an IBM computer.

Phone: (800) 426-4968
(800) 426-7378
Lotus phone: (800) 553-4270
IBM sales: (800) 746-7426
IBM Thinkpad (Lenovo) sales: Refer to Lenovo
IBM antivirus Refer to Symantec
TDD/TTY: (800) IBM-3383
Websites: IBM official website
E-mail: [email protected]
Address: IBM Corporation
1133 Westchester Avenue
White Plains, New York 10604

IBM PC Company
11400 Burnet Rd.
Austin, TX 78758

IBM Parts Order Center
6300 Diagonal Highway
Boulder, CO 80301

IBM National Publications
4800 Falls of The Neause
Raleigh, NC 27609
Stock: IBM

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IBM company questions

Does IBM still make computers?

IBM no longer makes personal computers. However, the company still does make mainframes and servers for businesses and governments.

IBM news and history

October 28, 2018 - IBM announced its plans to acquire Red Hat for approximately $34 billion.

February 16, 2011 - Watson, an IBM supercomputer, beats the two best human Jeopardy players in a three-day event with a score greater than the two human players combined.

2005 - Lenovo completed the acquisition of IBM's Personal Computing Division.

December 08, 2004 - IBM sold its computing division to Lenovo Group for $1.75 billion.

December 31, 2002 - Hitachi closed deal to purchase IBM's hard drive operation for $2.05 billion.

August 04, 2002 - IBM acquired Pricewaterhouse Coopers Consulting.

November 2001 - IBM started the Eclipse project.

August 14, 2001 - IBM stops selling AMD-based PCs in North America.

July 1999 - IBM acquired Sequent Computer Systems.

January 1, 1999 - All IBM antivirus technical support problems should now be addressed through Symantec.

November 10, 1999 - IBM today announced the industry's largest resolution, production-level LCD monitor panel available.

December 5, 1995 - IBM unveiled Deep Blue, a parallel computing system that would later play the World Chess Champion Garry Kasparov.

1986 - The AT or 101 key keyboard is introduced by IBM.

1984 - IBM's AT computer was introduced.

1984 - IBM introduces its portable computer, the IBM Portable weighing in at 30-pounds.

August 12, 1981 - IBM joins the computer race by introducing IBM 5150 PC that used the 4.77 MHz Intel 8088 processor, 16 kB base memory, and PC-DOS (MS-DOS) for the OS.

1980 - IBM hires Microsoft to develop versions of BASIC, Fortran, COBOL, and Pascal for the PC being developed by IBM.

July 27, 1961 - The first IBM Selectric typewriter was released.

1956 - On September 13, 1956, the IBM 305 RAMAC was the first computer to be shipped with a hard drive. The hard drive contained 50 24-inch platters and was capable of storing 5 million characters and weighed a ton.

1924 - C-T-R adopted the name IBM (International Business Machines).

July 25, 1911 - IBM was granted its first patent #998,631.

June 16, 1911 - Computing-Tabulating-Recording Company was incorporated.

October 11, 1907 - IBM filed for its first U.S. patent, #998,631.

1896 - The company we know today as IBM was started as Tabulating Machine Company.