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The original IBM Personal Computer, with monitor and keyboard. The IBM Personal Computer, commonly known as the IBM PC, spanned multiple models in its first generation (including the PCjr, the Portable PC, the XT, the AT, the Convertible, and the /370 systems, among others), from 1981 to 1987.
Initially, model 1 (4952, Model C), [4] model 3 (IBM 4953) and model 5 (IBM 4955, Model F [4]) processors were provided. Later processors were the model 4 (IBM 4954) and model 6 (IBM 4956). Don Estridge had been the lead manager on the IBM Series/1 minicomputer. He reportedly had fallen out of grace when that project was ill-received.
Products, services, and subsidiaries have been offered from International Business Machines (IBM) Corporation and its predecessor corporations since the 1890s. [1] This list comprises those offerings and is eclectic; it includes, for example, the AN/FSQ-7, which was not a product in the sense of offered for sale, but was a product in the sense of manufactured—produced by the labor of IBM.
"There are two versions of the Model 168: the Model 1 and the Model 3." [5]: preface IBM referred to the System/370 Model 168-3 as "the company's previous flagship" [8] when comparing it and the then-new IBM 3033. The 168-3 CPU's internal performance has been described as 5–13% faster than the 168-1. [5]: p.125
As with the 1301, there is a Model 2 which doubles the capacity by stacking two modules. The IBM 1302 Model 1 leased for $5,600 per month or could be purchased for $252,000. Prices for the Model 2 were $7,900 per month or $355,500 to purchase. The IBM 7631 controller cost an additional $1,185 per month or $56,000 to purchase.
With descriptions, photos and rental prices. IBM (1959). IBM Operators Guide: Reference Manual (PDF). A24-1010-0. The IBM Operators Guide, 22-8485 was an earlier edition of this book; Murray, Francis J. (1961). Mathematical Machines Volume 1: Digital Computers. Columbia University Press. Has extensive descriptions of unit record machine ...
The company priced its IPO above its previous target range of $28-$31, valuing the Palo Alto, California-based Rubrik at around $5.6 billion based on the outstanding shares listed in its filing ...
The IBM System/370 Model 148 (and the Model 138 [1]) were both announced June 30, 1976 [2]. Not only were they both more powerful and better in price/performance than the IBM System/370 Model 145 with a 3145-3 CPU and the IBM System/370 Model 135 with a 3135-3 CPU, respectively, but lower in price.