• Thumbnail for Drum memory
    computer memory. Many early computers, called drum computers or drum machines, used drum memory as the main working memory of the computer. Some drums were...
    10 KB (1,233 words) - 21:45, 24 May 2024
  • Thumbnail for IBM 305 RAMAC
    length decimal (BCD) computer with a drum memory rotating at 6000 RPM that held 3200 alphanumeric characters. A core memory buffer of 100 characters was used...
    16 KB (1,586 words) - 14:28, 18 September 2024
  • Thumbnail for Virtual memory
    memory that consisted of 16,384 words of primary core memory with an additional 98,304 words of secondary drum memory. The addition of virtual memory...
    38 KB (4,698 words) - 00:24, 17 January 2024
  • Thumbnail for Vacuum-tube computer
    access memory of 1,024 words of 36 bits each. The access time for Williams-tube memory on the IBM 701 was 30 microseconds. Magnetic drum memory was invented...
    25 KB (2,718 words) - 20:27, 25 August 2024
  • Thumbnail for Random-access memory
    for main memory functions. Ultrasonic delay lines were serial devices which could only reproduce data in the order it was written. Drum memory could be...
    58 KB (5,942 words) - 19:18, 11 September 2024
  • main memory is called "RAM" (an acronym of random-access memory) and secondary storage is called "disk" (a shorthand for hard disk drive, drum memory or...
    42 KB (5,333 words) - 09:10, 26 August 2024
  • Thumbnail for Computer memory
    terms RAM, main memory, or primary storage. Archaic synonyms for main memory include core (for magnetic core memory) and store. Main memory operates at a...
    29 KB (3,284 words) - 18:53, 5 September 2024
  • Thumbnail for ECC memory
    Error correction code memory (ECC memory) is a type of computer data storage that uses an error correction code (ECC) to detect and correct n-bit data...
    30 KB (3,404 words) - 05:02, 31 May 2024
  • non-volatility. Magnetic tape is a type of sequential access memory still in use; historically, drum memory has also been used. Sequential access Basic sequential...
    2 KB (184 words) - 22:57, 23 May 2024
  • Thumbnail for History of computing hardware
    in a mechanically rotating drum for memory. However, its paper card writer/reader was unreliable and the regenerative drum contact system was mechanical...
    170 KB (17,683 words) - 21:58, 14 September 2024