Communication has expanded allows for easier contact abroad Immediate updates on world issues war, weather, natural disasters etc Disadvantages: People lack the interpersonal skills necessary for in-person interactions Promotes anti-social behaviors from hours of computer use Leads to obesity due to lack of exercise as a result of hours of computer use Cyber bullying increased Unsafe features for underage users. Beforehand others have to sift through the books looking and trying to find the information yet today we can type it into Google and find the answer in a second.
Most of its instructions assume that operands will be from the stack, and results placed in the stack. For a typical instruction like "Add," the computer takes both operands from the topmost most recent values of the stack.
The computer replaces those two values by the sum, calculated by the computer when it performs the "Add" instruction. Most stack instructions have only an opcode commanding an operation, with no additional fields to identify a constant, register or memory cell.
The stack easily holds more than two inputs or more than one result, so a richer set of operations can be computed.
Integer constant operands are often pushed by separate Load Immediate instructions. Memory is often accessed by separate Load or Store instructions containing a memory address or calculating the address from values in the stack.
For speed, a stack machine often implements some part of its stack with registers. To execute quickly, operands of the arithmetic logic unit ALU may be the top two registers of the stack and the result from the ALU is stored in the top register of the stack.
Some stack machines have a stack of limited size, implemented as a register file. The ALU will access this with an index. This is slower, but the number of flip-flops is less, making a less-expensive, more compact CPU.
Its topmost N values may be cached for speed. A few machines have both an expression stack in memory and a separate register stack. In this case, software, or an interrupt may move data between them. The instruction set carries out most ALU actions with postfix reverse Polish notation operations that work only on the expression stack, not on data registers or main memory cells.
This can be very convenient for executing high-level languages, because most arithmetic expressions can be easily translated into postfix notation. In contrast, register machines hold temporary values in a small, fast array of registers.
Accumulator machines have only one general-purpose register. Belt machines use a FIFO queue to hold temporary values. Memory-to-memory machines do not have any temporary registers usable by a programmer. Stack machines may have their expression stack and their call-return stack separated or as one integrated structure.
If they are separated, the instructions of the stack machine can be pipelined with fewer interactions and less design complexity. Usually it can run faster. Some technical handheld calculators use reverse Polish notation in their keyboard interface, instead of having parenthesis keys.
This is a form of stack machine. The Plus key relies on its two operands already being at the correct topmost positions of the user-visible stack. Advantages of stack machine instruction sets[ edit ] Very compact object code[ edit ] Stack machines have much smaller instructions than the other styles of machines.
Loads and stores to memory are separate and so stack code requires roughly twice as many instructions as the equivalent code for register machines. The total code size in bytes is still less for stack machines[ citation needed ].
In stack machine code, the most frequent instructions consist of just an opcode selecting the operation. This can easily fit in 6 bits or less.To hit the mind that a language has not a vehicle of thoughts. Description: can you re-write this sentence?
has become global language has become a global language. english is a international language english is an international language. other people who belongs to other country. other people who belong to . The English language is one of the languages most commonly spoken throughout the world and is the leading language of contact in the global business world.
When an Israeli businessman meets with a Japanese or Chinese businessman, chances are he will speak to him in English. “Do you think the advantages outweigh the disadvantages?” is a common IELTS essay question in writing task 2 which many students struggle with.
I cannot emphasize enough that what you’re (I’m) trying to achieve here is the same sort of spontaneous comfort-level and ability to express myself in a flowing, continuous and natural fashion which I enjoy in my native spoken language, English.
The world's most widely spoken languages by number of native speakers and as a second language, according to figures from UNESCO (The United Nations’ Educational, Scientific and Cultural. Roosevelt believed that America, as a country, must have one flag and also have one language.
In August , the U.S. House of Representatives approved a bill that would make English as the official language of the government and require that the government preserve and enhance the official status of the language.