The most unimportant things you'll never need to know about commercial computers of 1970s


Purposes of Commercial Computers of 1970s:

1. to process bulk organized data, for better comprehension (create, change, remove, re-organizing, display, and compute)
2. data were used to be mostly in the form of tables, for e.g., a census may have data of net persons in a specified region, count of people and languages they can speak, people and age, people and sex, other demographics, statistics of a citizen, a family, a household, a region, a district, a state or a nation
Usually it has
Demographics [population density, population size, sex ratio, sex ratio 0-6 yrs.]
Education [Literates and Literacy rate]
Residences [Residential, Non-Residential, Vacant, Occupied, Total]
Household Size [1 person, 2 person, 3-5 persons, 6-8 persons, >9 person]
Marital Status
Source of Drinking Water [Tap, Well, Tubewell/Borewell/Handpump, Others ]
Location of Drinking Water [In the premise, Near the premise, Away from premise]
Source of Lightening [Electricity, Kerosene, LPG, Solar, Others]
Location of Sanitation [In the premise, Near the premise, Away from premise]
Sink of Sanitation [Latrine Facility, Pit Latrine, ]
Kitchen Fuel [Firewood, Cropresidue, Cowdung cake, coal, lignite, charcoal, kerosene, CNG/LPG, others]
Banking Services 
Assets [Radio/Transistor, Television, Computer/Laptop, Telephone/Mobile Phone, Bicycle, Scooter/Motorcycle/Moped, Car/Jeep/Van]

Data driven industries: Census, Accounting (Banking/Finance), Inventory Control (SCM), Telecom (DTH), Healthcare, Social Media, Marketing, HR, Manufacturing, Retail, Sales, Education (Encyclopedia)


Years and Machines:

1950: IBM 407
The 407 read punched cards, totaled fields on the cards, made simple decisions, printed results, and, with the aid of a summary punch, output results on punched cards that could be input to other processing steps.

1960: IBM 1400
16,000 characters of memory; The 1240 was a banking system, equivalent to the 1440 system with MICR support. The IBM 7010 was logically but not physically identical to a 1410, and twice as fast.
The IBM System/360 Model 30 could be ordered with a 1401 compatibility microprogram feature. Several 1400 series peripherals were adapted for use with System/360.
Programming languages for the 1400 series included Symbolic Programming System (SPS, an assembly language), Autocoder (a more fully featured assembly language), COBOL, FORTRAN, Report Program Generator (RPG), and FARGO.

Peripherals used with 1400 series machines included:
Card reader/punches: IBM 1402, IBM 1442
Printers: IBM 1403, IBM 1443
7 track tape drives: IBM 729, IBM 7330
Disk drives: IBM 1301, IBM 1311
Check processing IBM 1210
Paper tape input/output

The 1400 series was replaced by System/360 and, later, by low-end machines like the IBM System/3, System/32, System/34, System/36, System/38, and AS/400.
Two 1401 computers have been restored to full operational status at the Computer History Museum, Mountain View, California, US.

During 1930s, Commercial computers were called as Tabulators.

The 1880 census had taken eight years to process.

Earliest tabulating machine was developed to help process data for the 1890 U.S. Census. 

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