h***@bbs.cpcn.com
2005-06-16 14:58:52 UTC
In a library, I found a late 1950s IBM proposal to
install a 705-III computer system. Included with
the proposal was proposed system operation which included
considerable support work with traditional tabulating
machines. In other words, some files would be maintained
on punch cards alongside the computer and processed through
tab gear such as the collator, sorter, and tabulator. Only
the really complicated work would be fed into the computer
and processed to/from tape files.
The computer had no disks. However, it would've provided
an "on-line" inquiry function by suspending an ongoing
program, loading in a special search program, doing
a semi-indexed sequential search on tape files (that were
always mounted), and typing the results on the console printer.
Response time was estimated to be in minutes.
I believe they recommended ten tape drives.
Anyway, it appears back in the 1950s and early 1960s
that tab machines play a vital role in data center
operations working with electronic computers.
I wonder if that was a marketing decision by IBM so as to
keep older tab machines still in service earning rent, or
was necessary due to the limited I/O capability of electronic
computers. Or maybe the electronic computer could only do
so much work and the rest had to still be done the old way.
Remember, until the 1401 came out, card readers and printers
for IBM mainframes were terribly slow--reading and printing
150 lines a minute. IBM simply modified its existing tab
machines to serve as I/O units. The computer programs
didn't format data, rather it was done by plugboards.
The early machines allowed direct tape-to-tab and tab-to-tape
copying to process card files offline while the mainframe was
doing something else.
IIRC the proposal, a C/E would visit daily to power up the
machine and ensure all tubes were working and replace any
burned out.
The proposal itself was typewritten, using a carbon film
ribbon and proportional type. By 1950s standards it
looked good, but it was still obviously typewritten and
there was an occasional character that hit the line wrong.
install a 705-III computer system. Included with
the proposal was proposed system operation which included
considerable support work with traditional tabulating
machines. In other words, some files would be maintained
on punch cards alongside the computer and processed through
tab gear such as the collator, sorter, and tabulator. Only
the really complicated work would be fed into the computer
and processed to/from tape files.
The computer had no disks. However, it would've provided
an "on-line" inquiry function by suspending an ongoing
program, loading in a special search program, doing
a semi-indexed sequential search on tape files (that were
always mounted), and typing the results on the console printer.
Response time was estimated to be in minutes.
I believe they recommended ten tape drives.
Anyway, it appears back in the 1950s and early 1960s
that tab machines play a vital role in data center
operations working with electronic computers.
I wonder if that was a marketing decision by IBM so as to
keep older tab machines still in service earning rent, or
was necessary due to the limited I/O capability of electronic
computers. Or maybe the electronic computer could only do
so much work and the rest had to still be done the old way.
Remember, until the 1401 came out, card readers and printers
for IBM mainframes were terribly slow--reading and printing
150 lines a minute. IBM simply modified its existing tab
machines to serve as I/O units. The computer programs
didn't format data, rather it was done by plugboards.
The early machines allowed direct tape-to-tab and tab-to-tape
copying to process card files offline while the mainframe was
doing something else.
IIRC the proposal, a C/E would visit daily to power up the
machine and ensure all tubes were working and replace any
burned out.
The proposal itself was typewritten, using a carbon film
ribbon and proportional type. By 1950s standards it
looked good, but it was still obviously typewritten and
there was an occasional character that hit the line wrong.