This blog about Computer History

Sunday, October 9, 2011

1950s - 1970s

October 09, 2011
The IBM 350 Disk File, invented by Reynold Johnson, was introduced in 1956 with the IBM 305 RAMAC computer. This drive had fifty 24 inch pla...

Wednesday, June 29, 2011

IBM 3380

June 29, 2011
The IBM 3380 Direct Access Storage Device was introduced in June 1980. It used new film head technology and had a capacity of 2.52 gigaby...

Sunday, May 22, 2011

Sunday, April 24, 2011

Friday, April 15, 2011

IBM 3340

April 15, 2011
Models A2, B1 and B2 announced March 13, 1973 Models B1 and C2 withdrawn December 20, 1983 Models A2 & B2 withdrawn May 1, 1984 Follow...

Friday, April 8, 2011

IBM 3330

April 08, 2011
The IBM 3330 Direct Access Storage Facility , code-named Merlin , was introduced in June 1970 for use with the IBM System/370 and the IBM Sy...

Tuesday, March 29, 2011

IBM 2310

March 29, 2011
The IBM 2310 Removable Cartridge Drive was announced in 1964 with the IBM 1800 and then in 1965 with the IBM 1130; it likely first shipped...

Sunday, March 27, 2011

Sunday, March 20, 2011

IBM 2311

March 20, 2011
The IBM 2311 Direct Access Storage Facility was introduced in 1964 for use throughout the System/360 series. It was also available on the I...

Sunday, March 13, 2011

IBM 2305

March 13, 2011
The IBM 2305 Direct Access Storage Facility was a fixed-head disk drive originally announced in 1970 to connect to the 360/85 and 360/195 ...

Tuesday, February 8, 2011

Sunday, February 6, 2011

IBM 1311

February 06, 2011
The IBM 1311 Disk Storage Drive was announced on October 11, 1962 and was designed for use with several medium-scale business and scienti...

Friday, February 4, 2011

IBM 1302

February 04, 2011
The IBM 1302 Disk Storage Unit was introduced in September 1963. Improved recording quadrupled its capacity over that of the 1301, to 117 ...

Thursday, February 3, 2011

IBM 1301

February 03, 2011
The IBM 1301 Disk Storage Unit was announced on June 2, 1961. It was designed for use with the IBM 7000 series mainframe computers and the ...

Tuesday, February 1, 2011

IBM 1405

February 01, 2011
The IBM 1405 Disk Storage Unit was announced by 1961 and was designed for use with the IBM 1401 series, medium scale business computers. Th...

Sunday, January 30, 2011

IBM 355

January 30, 2011
The IBM 355 was announced on September 14, 1956 as an addition to the popular IBM 650. It used the same mechanism as the IBM 350 and stored...

Friday, January 28, 2011

IBM 353

January 28, 2011
The IBM 353 used on the IBM 7030, was similar to the IBM 1301, but with a faster transfer rate. It had a capacity of 2,097,152 (2 21 ) 64-b...

Thursday, January 27, 2011

IBM 350

January 27, 2011
The IBM 350 disk storage uni t , the first disk drive, was announced by IBM as a component of the IBM 305 RAMAC computer system on September...

Wednesday, January 26, 2011

Tuesday, January 25, 2011

Saturday, January 22, 2011

Thursday, January 20, 2011

Wednesday, January 19, 2011

Sunday, January 16, 2011

Friday, January 14, 2011

Thursday, January 13, 2011

Wednesday, January 12, 2011

Monday, January 10, 2011