Research

The Early Computer Memory Since the ENIAC -- the first computer to be used commercially, went into service in 1945, there have been only three major memory formats. In 1945, the ENIAC computer used thousends of vacuum tubes and had a memory of mercury and nickel wire delay lines. Between 1945 and 1954, delay lines, William tubes and magnetic drums was used as memory devices.

The history and development of computer RAM, and considerations when upgrading your computer's memory.

Computer memory timeline part 1 of 4 from 1833 to 1951 at Timeline Help. Ever wondered how the data on your computer are stored? The storage or memory devices have a long history, back to the 19th century. All computer components and functions, for example recording devices, get their instructions and data from chips, to put it simply. Here's how it started, I wrote the history of inventions, patents and improvements down in a computer memory timeline.

From early punched cards to high-tech silicon chips, take a walk down the computer’s memory lane and discover how RAM was born.

A DIMM or dual in-line memory module, comprises a series of dynamic random access memory integrated circuits. These modules are mounted on a printed circuit board and designed for use in personal computers, workstations and servers. DIMMs began to replace SIMMs (single in-line memory modules) as the predominant type of memory module as Intel P5-based Pentium processors began to gain market share.

Dynamic random-access memory (DRAM) is a type of random-access memory that stores each bit of data in a separate capacitor within an integrated circuit. The capacitor can be either charged or discharged; these two states are taken to represent the two values of a bit, conventionally called 0 and 1. Since capacitors leak charge, the information eventually fades unless the capacitor charge is refreshed periodically. Because of this refresh requirement, it is a dynamic memory as opposed to SRAM and other static memory.

RAM parity determines whether a random access memory unit stores a parity bit for error detection purposes. Non-parity RAM does not include a parity bit, and parity RAM does. Parity RAM requires one additional bit to be stored with each byte of information, requiring memory modules to store 9, rather than 8, bits for every byte.

Random-access memory (RAM) is a form of computer data storage. Today, it takes the form of integrated circuits that allow stored data to be accessed in any order with a worst case performance of constant time. Strictly speaking, modern types of DRAM are therefore not random access, as data is read in bursts, although the name DRAM / RAM has stuck. However, many types of SRAM, ROM, OTP, and NOR flash are still random access even in a strict sense. RAM is often associated with volatile types of memory (such as DRAM memory modules), where its stored information is lost if the power is removed. Many other types of non-volatile memory are RAM as well, including most types of ROM and a type of flash memory called NOR-Flash. The first RAM modules to come into the market were created in 1951 and were sold until the late 1960s and early 1970s.

CODASYL (often spelled Codasyl ) is an acronym for "Conference on Data Systems Languages". This was a consortium formed in 1959 to guide the development of a standard programming language that could be used on many computers. This effort led to the development of COBOL and other standards.

The Word Of Codd Without the pioneering work of Edgar F Codd, a British computer scientist, the world may never have known of Relational Databases. Folks starting out with Relational Databases often get confused. I always get confused when I start something new so I know how you feel. Here is a simple explanation from Edgar Codd -who invented Relational Databases, The Wheel, Electricity and Hamburgers back in 1969. He actually only invented one of these things - can you guess which?