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The evolution of hard drives and Storage

The punch card A punch card was once the basis for digital information used for computer programs and data storage. They were widely used throughout the first half of the 20 th century in processing machines to input data and to store it. Punch cards could be fed into the first commercial computer, IBM 305 system, which then stored the data on hard disks. IBM 350 disk storage unit The 350 Disk Storage System was a major component of the IBM 305 RAMAC (Random Access Method of Accounting and Control) system, which was introduced in September 1956. It consisted of 40 platters and a dual read/write head on a single arm that moved up and down the stack of magnetic disk platters. Those 40 platters stored a whopping (for the time) 5MB of data.

Top 10 Open Source PBX Software.

PBX (Private Branch Exchange) is a small telephone switch that is used to establish connections among the internal telephones of a private organization. PBX reduces the overall cost of telephony in a company by reducing the total number of telephone lines they need to lease from the telephone company. Without a PBX a company needs to lease one telephone line for every employee with a telephone. The company only needs to lease as many lines from the telephone company as the telephone company as maximum number of employees that will be making outside calls at one time. It is nearly 10% of the number of extensions. In a PBX system, every telephone is wired to the PBX. When an employee takes the receiver off hook and dials the outside access code, the PBX connects the employee to an outside line. The enterprise-class PBX including directory-based voicemail, conference calling, integrated messaging, interactive voice response (IVR), three-way calling, caller ID, and call queues. T

Microsoft Windows - Evolutions

Microsoft Started Operating System with DOS (Disk Operating System) and earlier versions of Windows were started with command line interface, we were needed to change the date, time and then EDIT program was used to make files in 1985 Microsoft Introduced Windows 1.0, to start windows from DOS win command was used, Microsoft Windows Logo also changed since 1985. Here is a family tree of windows

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