notes of SS n IS

ntroduction 1.1 MANAGEMENT INFORMATION SYSTEM ( MIS) CONCEPT The concept of the MIS has evolved over a period of time comprising many dif erent facets of the organizational function. MIS is a neces ity of al the organizations. The init al concept of MIS was to proces data from the organization and present it in the for of reports at regular intervals. The system was largely capable of handling the data from col ection to proces ing. It was more impersonal, requiring each individual to pick and cho se the proces ed data and use it for his requirements. This concept was further modified when a distinction was made betwe n data and information. The information is a product of an analysis of data. This concept is similar to a raw material and the finished product. What are ne ded are information and not a mas of data. However, the data can be analyzed in a number of ways, producing dif erent shades and specifications of the information as a product. It was, therefore, demanded ...

• What is an information system? • A set of interrelated components that collect (or retrieve), process, store, and distribute information to support decision making and control in an organization Management information system (MIS) • An MIS provides managers with information and support for effective decision making, and provides feedback on daily operations • Output, or reports, are usually generated through accumulation of transaction processing data • Each MIS is an integrated collection of subsystems, which are typically organized along functional lines within an organization Information Systems in the  Enterprise Objectives • Evaluate the role played by the major types of systems in a business and their relationship to each other • Describe the information systems supporting the major business functions: sales and marketing, manufacturing and production, finance and accounting, and human resources Different kinds of IS 1. Operat...

UNIT 4 Editors and Debugging Systems This Chapter gives you…  Text editors  Interactive Debugging Systems 4.0 Introduction An Interactive text editor has become an important part of almost any computing environment. Text editor acts as a primary interface to the computer for all type of “knowledge workers” as they compose, organize, study, and manipulate computer-based information. An interactive debugging system provides programmers with facilities that aid in testing and debugging of programs. Many such systems are available during these days. Our discussion is broad in scope, giving the overview of interactive debugging systems – not specific to any particular existing system. 4.1 Text Editors An Interactive text editor has become an important part of almost any computing environment. Text editor acts as a primary interface to the computer for all type of “knowledge workers” as they compose, organize, study, and manipulate computer-based information. A text edi...

Assembler Design Assembler is system software which is used to convert an assembly language program to its equivalent object code. The input to the assembler is a source code written in assembly language (using mnemonics) and the output is the object code. The design of an assembler depends upon the machine architecture as the language used is mnemonic language. 1. Basic Assembler Functions: The basic assembler functions are:  Translating mnemonic language code to its equivalent object code.  Assigning machine addresses to symbolic labels. • The design of assembler can be to perform the following: – Scanning (tokenizing) – Parsing (validating the instructions) – Creating the symbol table – Resolving the forward references – Converting into the machine language • The design of assembler in other words: – Convert mnemonic operation codes to their machine language equivalents – Convert symbolic operands to their equivalent machine addresses – Decide the proper instru...