History and Components of a Modern Mainframe Computer

Mainframe computers are critical for some of the largest corporations in the world. Each mainframe has more than one modern processor, RAM ranging from a few megabytes to multiple-score gigabytes, and disk space and other storage beyond anything on a microcomputer. A mainframe can control multiple tasks and serve thousands of users every second without downtime.

The chief difference between mainframes and other computing systems is the level of processing that takes place. Mainframes are also different in terms of data bandwidth, organization, reliability, and control. Big organizations-banking, healthcare, insurance, and telecom companies, etc.-use mainframes for processing critical commercial data.

In this article, we discuss the evolution of mainframe computers and their components.

History of mainframe computers

IBM developed a critical part of mainframe computing, the Automatic Sequenced Controlled Calculator (ASCC) for arithmetic operations, in 1944. From the late 1950s through the 1970s, several companies manufactured mainframes: IBM, Burroughs, RCA, NCR, General Electric, and Sperry Rand, for example. Since then, System / 390 by IBM is the only kind of mainframe in use. It evolved from IBM's System / 360 in 1960.

An Early mainframe occupied a huge space. New technologies have drastically reduced the size and cost of the hardware. A current-generation mainframe can fit in a small closet.

Components of a modern mainframe computer

Like a PC, a mainframe has many components for processing data: operating system, motherboard or main board, processor, controllers, storage devices, and channels.

• Motherboard: The motherboard of a mainframe computer consists of a printed circuit that allows CPU, RAM, and other hardware components to function together through a concept called "Bus architecture". The motherboard has device slots for input cards and cable interfaces for various external devices. Where PC motherboards use 32- or 64-bit buses, mainframes use 128-bit buses. General instructions regarding the internal architecture help the motherboard connect to the other devices and retrieve data using binary computation.

• Processor: A CPU acts as the central processing point in mainframe architecture and includes an Arithmetic Logic Unit (ALU) for performing arithmetic calculations. It also works as a controller for the bus architecture and handles traffic and data requests. The processing power of mainframes is much higher compared to PCs, so that they can handle huge amounts of data.

• Storage devices: Storage devices are for entering, retrieving, storing, and recording data. Many are external devices, such as hard drives, tape drives, and punch card readers, all connected to terminals of the mainframe and controlled by the CPU. Their capacity for data storage can be hundred or even thousands of times that of a PC.

• Communication controllers: Communication controllers allow remote computers to access a mainframe. With the help of networks, LAN or WAN, communication controllers establish connections with various devices, perform data transmission over communication channels, and keep track of users at terminals.

• Channels: The "channels" are the cables used to connect the CPU and the main storage to other parts of the system and make sure that data is moved in a systematic way without losing its integrity.

Modern mainframes have advanced features such as expanded service management capabilities, cross-platform integration facilities, etc. And so are suitable for critical data center operations. The cost of maintaining modern mainframes is much less compared to older models.

Health and Its Dimensions

The most common theme of most cultures is fitness but there are different concepts of health as a part of their culture. Earlier health was considered as "absence of disease" which is not true. Health is not only the absence of disease it has various aspects. According to the latest definition wellbeing is a state of complete physical, mental and social wellbeing and not merely an absence of disease or infirmity.

Healthiness is a process of continuous adjustment to the changing demands of living and of the changing meanings we give to the life. It helps people live well, work well and enjoy themselves.

New philosophy of health regarding health as a fundamental right, it is an essence of productive life, it is an integral part of development and it is the central to the concept of quality of life and is a world wide social goal.

There are various dimensions of fitness it is not only physical factor corresponding to strength other factor included are mental, social, spiritual, emotional and voluntary.

Physical dimensions implying the notion of perfect functioning of body. Good complexion a clean skin, bright eyes, lustrous hair, firm body, sweet breath, good appetite, sound sleep, regular activity of bowels and bladder, smooth, easy and well coordinating bodily movements.

Mental dimension does not only include absence of mental illness. Good mental health is the ability to respond to various aspects of life of varying experiences with flexibility and a good sense of well understanding.

Social well-being exemplifies harmony and a good relation of an individual with the family members and the society. The interpersonal ties of a person and the involvement with the society are known as social well-being.

Spiritual dimension includes the search of an individual to find himself and to find the ultimate faith. Once a person has attained that ultimate faith it gives him a sense of fulfillment and satisfaction.

Emotional dimension includes the feelings and emotions and if a person is emotionally strong and satisfied he is safe from stress, depression and the person can perform all the roles of his life well.

Vocational dimension includes the work. It is believed that working is good for physical condition and work is sometimes fruitful in maintain both mental and physical condition of a human.

Types of Restaurants and Their Characteristics

A restaurant is a place where food & beverages are sold & served to customers. There are different types of restaurants that have evolved to meet the dynamic demands of consumers. The following are some well-known types of restaurants & their special characteristics:

Bistro: it is a small restaurant that serves simple, moderately priced meals & wine. Braised meets are typical dishes that are provided in a bistro. It may not have printed menus.

Brasserie: formal restaurant which serves drinks, single dishes & other meals. The waiters are in traditional uniform of long apron & waistcoats.

Coffee shop: mainly serves snacks & beverages 24 hours a day; however it may serve all the three meals. This concept has come from the USA. A ‘cover’ is a term referring to a place setting with necessary cutlery, crockery & glassware required at the beginning of the service for one person. Though the main feature is 24-hour operation, some coffee shops may close early, depending on their location.

Specialty Restaurant: it serves specialty dishes which are its strength & contribute to the brand image. It operates during luncheon & dinner hours, between noon & 3 PM & between 7 PM & 11 PM. The ambience & décor of the restaurant reflect the theme of the specialty restaurant. The dishes of a particular region of a country or a particular set of people are also termed as ethnic cuisine.

Fine Dining Restaurant: this kind of restaurant primarily caters to the requirement of the affluent market segment which wants to experience fine dining. The restaurant may either offer dishes of one particular region or country or exotic dishes from various cuisines, wines, spirits & digestives. It opens mostly during dinner time. The ambience & décor of the restaurant will be elegant & rich. The wait staff employed is skilled & has a sound knowledge of the dishes served. The restaurant employs sommeliers to serve wines & other alcoholic beverages.

Popular Restaurant: this type of restaurant is informal, yet hygienically kept & it is located in a busy area such as bus stands, railway stations, shopping area & so on, catering to the requirements of the middle class & the customers who are in a hurry. The menu may either be displayed on a board at a prominent place or printed & laminated. It operates from 7 AM to 11 PM. The food is plated in the kitchen & carried to the table on a tray & served. The service standards are low & informal. Space is utilized to the maximum to accommodate more covers. The seat turnover is very high but the average revenue per cover is low.

During busy lunch hours, these restaurants serve business lunch, mini-lunch, & thali meals in a separate area to speed up service.

Dhaba: it is a roadside food stall found on national & state highways, mainly catering to the requirements of heavy vehicle crew. It specializes in ounjabi cuisine & tandoor cooking, serving very limited dishes, which are freshly prepared. The service is very informal & there is hardly any cutlery used. The dishes served here are inexpensive & taste like home-made food.

Fast food joint: the fast food concept was first introduced in the USA & now it has become popular around the world. It is characterized by the speed of service & the affordable price of the menu items. Changes in eating habits, non-availability of time to wait at the table & eat, increase in the number of working women, advancement in food processing technology, growth of teenage market, & so on, have contributed to the success of fast food operations. It is located in very busy area.

Rotisserie: this type of restaurant specializes in grilled or roast meat, poultry, & fish, which are prepared in front of the guests.

Barbeque restaurant: the marinated pieces of meat, poultry, fish, vegetables, paneer, & so on, are inserted into skewers & cooked over live charcoal or electric griller. It is generally located near a swimming pool, roof top, lawn, sea side, & so on, & is open during evening hours.

Night club: it operates during the night & offers dinner, dance, & live entertainment. Cabarets or floor shows are the main attraction of the night club. Guests are required to wear formal wear.

Night clubs levy an entry fee.

Discotheque: it operates during night hours. It provides a dance floor for guest to dance on. Special sound & lightning effect is created for an appropriate ambience. Drinks, especially beer, & snacks are made available during the operations. The service is very informal. It is patronized mostly by the youth & couples. The entry is limited to a certain number of guests according to the floor/room capacity & an entry fee is levied.

Ice Cream parlor: it serves different kinds of ice creams-sundae, coupe, bombe, cassata, & so on. These ice creams are stored in ice cream containers & are kept in refrigerated displays with see through glass. The parlors may either be a franchisee or an independent one making its own varieties of ice creams. The seating arrangements & service are very informal. Guests may either eat in the premises or have it packed & carry.

Cafe: this is a restaurant of French origin, mainly serving coffee & snacks. The French colonies in India, but served Indian snacks such as vada, samosas, bonda, & so on, along with coffee & pastries. The customers are served at the table following the American style which increases the seat turnover, but the average revenue per cover is low due to the lower pricing of dishes.

Cafeteria: the traditional cafeteria system consists of a straight line of counters containing a variety of hot & cold dishes. The cashier who is at the end of the counter makes bills for the items selected & collects payment. This form is widely followed in institutional & industry catering establishments.

In modern ‘ free flow cafeteria’ system, the counters are segregated according to the type of dishes offered-hot or cold, appetizers, soups, breads, sandwiches, entrees, salads, pastas & so on. In most cafeteria-style operations in India, guests make payment at the counter beforehand for items they want to eat & collect them against the bill at the appropriate counters. Cafeterias are situated in railway stations, cinema halls, shopping complexes, college premises, office premises, & so on, where the guest expects quick service.

Food Court: it refers to a number of independent food stalls, each serving items of food. The customers order the food items they want to have & consume them at a common dining area. The types of dishes offered represent local cuisine & dishes that are popular globally. Food courts are found in big shopping complexes, entertainment complexes, amusement parks, airports, & so on where there is a heavy traffic of customers.

Kiosk: it is small permanent or temporary structure on a sidewalk from which items such as coffee, tea, chocolates, pastries, savories & so on, may be sold. Most kiosks do not have seating provision.

Drive-in: customers drive in, park their vehicles at a parking lot, & remain seated in their vehicles. The waiters go to the customers with menu cards, collect orders, & deliver the food items on specially designed trays & the customers remain parked while they eat.

Oyster Bar: it is a restaurant that specializes in the serving of fresh oysters. The oysters are opened or shelled behind the counter, within the sight of guests. Fresh oysters are served on a bed of crushed ice with oyster cruet, brown bread, & butter.

Pub: it mainly serves various kinds of beer, especially draught beer, & snacks.

Bars: it offers all kinds of spirits such as whiskey, rum, gin, vodka, brandy, tequila, wines, & beers. Hotels & restaurants have an additional bar in the food service area/restaurant to dispense wines, beers, & spirits during the service, called a dispense bar.

Carvery: it is restaurant serving roast meat & poultry, which are carved at the carving counter by a carver in the presence of guests. Table d’hôte menu of three or four courses with roast meat or poultry as the main course is offered.

All About Services Offered By Tow Truck Companies

If you own a car, there are good chances of you needing towing services at some point in your life. Whether it is a flat tire, a car breakdown or your vehicle meeting with an accident, you would certainly need the help of a valuable trailer towing service. You can avail towing services for your need 24 hours a day and even on holidays as well as inclement weathers.

When looking for a tow truck, it is important to get services from a professional and reputable provider. Vehicles that are not protected well can get damaged while in transit and lead to a difficult situation. You are likely to have a bad day when you are looking for the services of a tow truck, and it makes sense not to let this terrible experience make the situation even worse. Hence, it would do well to first do your own homework on the range of services available before utilizing any of them for the safety of your car. Before selecting any towing company, you should get answers to few questions like how much would they charge for providing the services of boosting the battery service, doing tire repair, the amount they charge per tow and the distance to which they offer their tow truck service. If the reasons for getting tow truck service are due to tire fixing, car towing, or jump start, it is important to get it done by a qualified towing service. If the services provided by the towing company are not perfectly done, there are good chances of damaging your car during its tow.

If you are unsure about the type of towing service you require for your specific need, you can inform the service provider about the kind of vehicle that you want to be towed. Any professional towing service will be able to advise you if your vehicle needs a flatbed tow truck service for its transportation. You could need towing service to help you get out of emergencies. It is in these situations that the best and efficient towing companies can help you get out of the unpleasant situations the most. The helpful employees of these towing companies can provide you with advice and help in selecting the right tow trucks for your specific situation. When it comes to selecting the right two trailer towing services, you are likely to find yourself in a confused situation. But you can free yourself of worry by the right selection of specialized and reliable company and ensure saving both your money and time. Next time when you are stuck somewhere, get precious advises and skill of a reliable towing company.