Second Generation of Computers (original) (raw)

Last Updated : 23 Jul, 2025

The second generation of computers was developed during the late 1950s to mid-1960s. These computers used transistors instead of vacuum tubes, which made them smaller, faster, and more reliable than 1st generation. They produced less heat and consumed less electricity. Programming languages like COBOL and FORTRAN were introduced during this time.

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The second generation (1950s-1960s) used transistors, making computers smaller and faster.

Second-generation computers were mainly used in scientific and business applications. They marked a big step forward in computer technology and efficiency.

➣ Read More on Generations of Computers [Read Here!]

**Characteristics of 2nd Generation of Computers

**Characteristic **Description
**Core Technology **Transistors replaced vacuum tubes, making systems smaller and faster.
**Size More compact than first-gen computers, using less physical space.
**Speed Increased processing speed and efficiency.
**Reliability More dependable with fewer system failures.
**Cost Lower operational costs due to improved efficiency and size.
**Languages Introduced **FORTRAN and **COBOL, enabling easier programming.
**Storage **Magnetic core memory and secondary storage (tapes, disks).
**Input/Output **Punch cards, **keyboards, and **line printers.
**Applications Used in scientific, business, and early commercial sectors.
**Energy Requirement The second generation of computers requires less amount of energy

Examples of the Second Generation of Computers

Here are some examples of the second generation of computers:

  1. **IBM 1401: Widely used for business applications, known for high-speed data processing.
  2. **IBM 7094: Advanced scientific computer, popular in research and military applications.
  3. **UNIVAC 1108: High-performance system for scientific and business data processing.
  4. **CDC 6600: One of the first supercomputers, designed for complex scientific calculations.
  5. **Burroughs B5000: Innovative for its time, focused on business data processing with advanced architecture.

First Generation Computers vs Second Generation Computers

First-generation computers used vacuum tubes, while second-generation computers used transistors, making them smaller, faster, and more efficient.

**Parameters **First Generation (1940s-1950s) **Second Generation (1950s-1960s)
**Technology Vacuum tubes Transistors
**Size Very large, room-sized Smaller, desk-sized
**Speed Slow Faster
**Reliability Unreliable, often broke More reliable
**Power Use High Lower
**Programming Machine language Easier languages (e.g., FORTRAN)
**Cost Very expensive Cheaper
**Memory Small (magnetic drums) Larger (magnetic core)
**Examples ENIAC, UNIVAC I IBM 1401, CDC 66

**Advantages

Some advantages of second-generation****,** computers over 1st generations are:

  1. **Smaller Size: Second-generation computers were **more compact compared to first-generation systems, thanks to the use of **transistors instead of bulky vacuum tubes.
  2. **Greater Reliability: Transistors were **more durable and less prone to failure than vacuum tubes, making these computers more **dependable overall.
  3. **Energy-Efficient: These computers consume **less power and generate less heat compared to their predecessors, though they still require **cooling systems.
  4. **Faster Processing Speed: Second-generation computers process data **faster, improving overall efficiency and reducing processing time.
  5. **Improved Accuracy: They offer **higher accuracy in calculations, with fewer errors compared to earlier systems.
  6. **Better Portability: The smaller size also makes them **easier to transport and integrate into different environments, improving flexibility.

**Disadvantages

However, second-generation computers still have some major issues, some of which are:

  1. **Cooling System Still Needed: Even though they generate less heat, these systems still require **cooling mechanisms to prevent overheating.
  2. **Maintenance Requirements: Regular **maintenance is necessary to keep the machines running smoothly, as they can still encounter issues over time.
  3. **High Manufacturing Cost: Producing second-generation computers was still **expensive, which limited their widespread availability.
  4. **Limited Application: These computers were mostly used for **specific purposes, such as scientific calculations or business data processing, making them less versatile.
  5. **Punch Card Input: They relied on **punch cards for input, a relatively slow and cumbersome method compared to modern input devices.

**Read About Other Generations

Generation Period Technology Used
First Generation of Computers (1964 - 1959) Vaccum Tubes
Second Generation of Computers (1959-1965) Transistors
Third Generation of Computers (1965 - 1971) Integrated Circuits
Fourth Generation of Computers (1971 - 1980) Microprocessors
Fifth Generation of Computers (1980 - present ) AI & ULSI

Sample Problems

**Question 1: Which of the following replaced Vacuum tubes in the second-generation computers?

(A) Transmitter
(B) Integrated Circuit
(C) Transistor
(D) None of the above

**Solution:

The correct option is C, i.e., Transistor.

Transistors replaced vacuum tubes in second-generation computers, allowing for more reliable and efficient systems.

**Question 2: Which language is used for programming in second-generation computers?

(A) Machine language
(B) Assembly language
(C) C/C++
(D) JAVA

**Solution:

The correct option is B, i.e., **Assembly language.

Second-generation computers primarily used assembly language for programming, a low-level language that allowed for better control over hardware.

**Question 3: Who invented the computer?

(A) Charles Babbage
(B) Jack Kilby
(C) Charles Kilby
(D) None of the above

**Solution:

The correct option is A,i.e., **Charles Babbage.

Charles Babbage is known as the "father of the computer" due to his invention of the analytical engine, an early mechanical computer.

**Question 4: Which of the following are the advantages of transistors over vacuum tubes?

(A) low cost
(B) Reduced heat dissipation problem
(C) low weight
(D) All of the above

**Solution:

The correct option is D, i.e., All of the above.

Transistors were more cost-effective, generated less heat, and were lighter than vacuum tubes, making them a key advancement in computer technology.

**Question 5: What was the duration or period of the second generation of computers?

(A) 1940-1956
(B) 1964-1971
(C) 1957-1963
(D) 1971- Present

**Solution:

The correct option is C, i.e., **1957-1963

The second generation of computers spanned from 1957 to 1963, marked by the transition from vacuum tubes to transistors.

**Question 6: In the Second Generation, the calculation can be done in __________?

(A) nanoseconds
(B) picoseconds
(C) microsecond
(D) None of the above

**Solution:

The correct option is C, i.e., **microsecond

Second-generation computers were faster, with calculations being performed in microseconds, significantly improving processing speed compared to first-generation computers.