Lesson plan

Single-level store

Single-level storage (SLS) or single-level memory is a computer storage term which has had two meanings. The two meanings are related in that in both, pages of memory may be in primary storage (RAM) or in secondary storage (disk), and that the physical location of a page is unimportant to a process. The term originally referred to what is now usually called virtual memory, which was introduced in 1962 by the Atlas system at the University of Manchester. In this system, data in the core memory was automatically moved to and from a magnetic drum to make it appear as if the core had the same storage capacity of the much larger drum. In modern usage, the term usually refers to the organization of a computing system in which there are no files, only persistent objects (sometimes called segments). Software, very similar to virtual memory and developed as an offshoot from it, allows data on external storage to be mapped into processes' address spaces, manipulated in memory, and invisibly written back to storage. The entire storage of the computer is thought of as a single two-dimensional plane of addresses (segment, and address within segment). The persistent object concept was first introduced by Multics in the mid-1960s, in a project shared by MIT, General Electric and Bell Labs.…

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Article summary

Single-level storage (SLS) or single-level memory is a computer storage term which has had two meanings. The two meanings are related in that in both, pages of memory may be in primary storage (RAM) or in secondary storage (disk), and that the physical location of a page is unimportant to a process. The term originally referred to what is now usually called virtual memory, which was introduced in 1962 by the Atlas system at the University of Manchester. In this system, data in the core memory was automatically moved to and from a magnetic drum to make it appear as if the core had the same storage capacity of the much larger drum. In modern usage, the term usually refers to the organization of a computing system in which there are no files, only persistent objects (sometimes called segments). Software, very similar to virtual memory and developed as an offshoot from it, allows data on external storage to be mapped into processes' address spaces, manipulated in memory, and invisibly written back to storage. The entire storage of the computer is thought of as a single two-dimensional plane of addresses (segment, and address within segment). The persistent object concept was first introduced by Multics in the mid-1960s, in a project shared by MIT, General Electric and Bell Labs.…

Key claims

  1. release date: 1978 — source: Wikipedia · confidence 0.95

Discussion questions

  1. Summarise the article in your own words. Which single claim would you verify first, and why?
  2. The record states that the release date is "1978". What evidence would count against this claim?
  3. Which claim in this article is most likely to be revised as the sources update? How would you check its current status?
  4. If two sources disagreed about one of these facts, what would you need in order to trust one over the other?

Bibliography

  1. Wikipedia https://en.wikipedia.org/w/index.php?oldid=1312108798

Key claims and bibliography are generated from the same tracked claims and sources as the article page.