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|The main diffence is related to access to resources
In 1970 I wrote a couple of assembler programs on and for the PDP-8 and PDP-9 and
there was virtually no one that you could ask a question
In the end of the 70-ties, we hacked Unix kernels and there were some local user groups to
share ideas. Note that the PDP-11 had an address space of 64K, and lots of effort went
in optimizing the use of limited resources. On an RP02 disk putting the free blocks
on tracks such that the amount of waiting time was limited increased performance tremendously
(of course adding an overlay structure to user programs to overcome the limited address
space caused a decrease in performance.
Neverthess, on a PDP-11/70 with a whole (i.e. 1) MByte of memory, two RL02 disks and an RP03
disk we ran a student lab for 30 to 40 students simultaneously, with a link to the
In the 70-ies and 80-ies - when writing compilers - we exchanged ideas with others using - hard to believe now - regular mail. Sending a draft report from europe to australia with additions and corrections being sent back took several weeks (sometimes more than a month), until
email arrived (around 82 or 83).
The basic facts that nowadays you do not have to worry about memory resources (recall, the PDP-8 has 4K 12 bits words, and for assembling a program you had to load the assembler from papertape), not to worry about storage capacity, and communication is now (almost) instant.
Ask a question and in 10 minutes (seconds sometimes) you have an answer!!.
On the other hand, the domain grew. In the '60-ies and -70-ties you hardly had
programming languages, knowing one or two languages, having some familiarity with
a computer, and being able to use some vague terms you was considered a specialist
in the whole field.
Now you have to specialize in front end technologies, backend technologies, middleware specialists, cloud guru, etc etc, while specialists in different subdomains
do not understand each other!!
As an example, look at the reports of the codewitch, while in the 70-ties (most of the)
stuff she writes about was part of any decent undergraduate program, I bet that 90 % of the CP population does not understand the technolgies she is applying.
(I take that as example, since in the 70-ties and 80-ies I worked in the field of compilers
and happen to understand this part of computer science)
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