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High-Tech Dictionary >>
Word Definition
MDX: Multidimensional Expressions
Multi-dimensional Expressions (MDX) is a query language for OLAP databases, which much like SQL is a query language for relational databases. It is also a calculation language, with syntax similar to spreadsheet formulas. MDX was first introduced as part of the OLEDB for OLAP specification in 1997 from Microsoft. The specification was quickly followed by the commercial release of Microsoft OLAP Services 7.0 in 1998, and later by Microsoft Analysis Services. While it was not an open standard, but rather a Microsoft-owned specification, it was adopted by a wide range of OLAP vendors.
Media Cleaner Pro
Media Cleaner Pro is a piece of software used to convert and optimize video and audio files for the Internet, DVD, CD-ROM, PowerPoint presentations, and other digital imagery.
Memory Management
Memory management is a technique used by the Mac OS to optimize the use of memory. The original problem for the designers of the Macintosh was how to make optimum use of the 128 kB of RAM that the machine was equipped with. Since at that time the machine could only run one application program at a time, and there was no permanent secondary storage, the designers implemented a simple scheme which worked well with those particular constraints. However, that design choice did not scale well with the development of the machine, creating various difficulties for both programmers and users. This technique is one of the key areas addressed by the change to Mac OS X.
Memwatch
Memwatch is a free programming tool for memory leak detection in C. It is highly portable ANSI C code which will run on just about any hardware that has a C compiler. While it is primarily intended to detect and diagnose memory leaks, it can also be used to analyze a programs memory usage and provides logging facilities.
Metadata
Metadata is data that describe other data. Metadata refers to information about data itself -- perhaps the origin, size, formatting or other characteristics of a data item. Metadata is of special interest in various fields of computer science, e. g. information retrieval and the semantic web. In the database field, metadata is essential to understanding and interpreting the contents of a data warehouse. Meta tags, a type of metadata, are optional elements defined in the header portion of an HTML or PHP file for web pages.
MicroBSD
MicroBSD is a fork of the UNIX-like BSD operating system descendant OpenBSD 3.0, begun in July 2002. The project's objective to produce a fully secure, complete system, but with a small footprint. The first phase of its development was aborted, but it has been resumed by a new group of developers.
Microcode
Microcode, also known as microprogram, refers to the instruction set of a CPU as a sequence of microcode instructions (microinstructions), each of which typically consists of a number of bit fields and the address of the next microinstruction to execute. Microcode is the translation layer between machine instructions and the elementary operations of a computer. Microcode is stored in ROM and allows the addition of new machine instructions without requiring that they be designed into electronic circuits when new instructions are needed. Several microinstructions will usually be required to fetch, decode and execute each machine code instruction. The elements composing the microprogram/microcode exist on a lower conceptual level than the more familiar assembler instructions. Each element is differentiated by the "micro" prefix to avoid confusion: microprogram, microcode, microinstruction, microassembler, etc.
Microinstruction: Micro code Instruction
Microcode Instructions (microinstructions) are very basic low-level instructions in a computer CPU, which are used to manipulate bit streams and byte ordering. Microinstructions can control data flow and instruction-execution sequencing in a processor at a more fundamental level than machine instructions. Typically, a series of microinstructions is necessary to perform an individual machine instruction.
Microkernel
A microkernel is a minimal computer operating system kernel providing only basic operating system services (system calls), while other services are provided by user-space programs called servers. Commonly, microkernels provide services such as address space management, thread management, and inter-process communication, but not networking or display for example.
Micro-programming
Micro-programming, also known as micro-coding, refers to the development of micro-programs or micro-codes, which are the instruction set of a CPU as a sequence of micro-code instructions (micro-instructions). Micro-programming allows CPU design engineers to write a micro-program to implement a machine instruction set. Even in the late stage of design process, micro-code could easily be changed. This greatly facilitated CPU design and led to more complex instruction sets. Architectures using micro-programming included the IBM System/360 and DEC VAX, the instruction sets of which were implemented by complex microprograms. The approach of using increasingly complex micro-code-implemented instruction sets was later called CISC.
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Word : CML
Explanation : Chemical Markup Language. An application of XML which makes it possible to incorporate chemical symbols into Web pages as easily as text.
 
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Tech Word for Today
 Word : thrival
 Explanation : Beyond survival is the idea of thriving or prospering in the new millennium. In addition to survival
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