What were early computers considered sensitive to?
Due to the huge number of heat-generating semiconductors and other components, mid '60s computers were kept in a VERY cool room to maintain an adequate temperature (typically 68 degrees F or so), with redundant air conditioners, in case one failed. Also, the huge disc drives that I saw had about 20" removable platters (a stack of 4-5 discs) as their storage discs. These were a whopping 40 Megabytes, as I recall. The washing machin-sized "Disc Drives" that held these massive platters HAD to have an excellent seal and vacuum system to keep dust particles out. The read/write heads floated so close to the discs that a particle of dust, or a smoke particle inside the drive could "crash" the heads. These were computers from about 1967 or so.
Early Computers were large in size while today computers are compacted . Early Computers were Vaccum tube and transistor based while today computers are ICs based. Early Computers were slow and today computers are fast. Early Computers were used punch card for storage while today computers used Secondry storage ( Hard Disk) for storage. Early Computers were not user friendly todays computers are user friendly
That would be a computer that was entirely mechanical. Historians like to compare certain kinds of cloth weaving equipment to mechanical computers. The first generation computers are normally considered to be the ones built with vacuum tubes and span the time period from the early 1940s to about 1958 when transistorized computers (e.g. IBM 7090) appear.
As with all computers early mainframes did not multitask (early microcomputers did not multitask, early minicomputers did not multitask, early supercomputers did not multitask). Now almost all computers multitask. Multitasking has nothing to do with the size of a computer, it is almost entirely a software feature of the OS running on the computer.
The first devices that resemble modern computers date to the mid-20th century (1940-1945), although the computer concept and various machines similar to computers existed earlier. Early electronic computers were the size of a large room, consuming as much power as several hundred modern personal computers(PC)
They are first generation computers because they used vacuum tubes as active elements, as did almost all computers until 1958 when the first generation is usually considered to have ended. From 1958 on most computers used discrete transistors as active elements until 1964. Note: ABC & ENIAC are both very early first generation computers as they used ordinary Radio receiver vacuum tubes, not the more expensive Computer vacuum tubes that were introduced about 1948 to…
The term Personal Computer dates back to the early 1960's when people were predicting such devices at a time when computer users had to share a connection to a large mainframe computer. The Hewlett Packard 9100A was advertised as a personal computer in the late 1960's but would be considered a programmable calculator today. With the arrival of microprocessor chips in the early 1970's early personal computers were sold in a kit form that people…