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32 votes
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How and what did it mean to connect to ARPANET from home?

You dial in with a terminal to a TIP (Terminal Interface Processor), which then offers a simple command interface to connect you to some host machine. Living Internet web site Wikipedia Functionally, ...
dave's user avatar
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29 votes
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Was ARPANET connecting mainframes or terminals?

Strictly speaking, ARPANET connected IMPs (Interface Message Processors), or similar pieces of equipment, but people thought of it as connecting mainframes or minicomputers and that’s what appears on ...
Stephen Kitt's user avatar
19 votes
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How fast was ARPANET?

From the IEEE Annals of the History of Computing 44(2) 8-19 (2022) titled Seeking High IMP Reliability in Maintenance of the 1970s ARPAnet on finds The design called for a small computer called an ...
Jon Custer's user avatar
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12 votes

How and what did it mean to connect to ARPANET from home?

Simply, he built a serial terminal which reads ASCII text from an RS-232 connection and displays it on the screen. Then when you type something on the keyboard, it sends that back over the RS-232 ...
snips-n-snails's user avatar
10 votes

Anecdote in Weinberger's Psychology of Computer Programming: is it ARPANET?

Not really, as the IMP implementation was done by a single company (Bolt Beranek and Newman Inc.) at a single location in Cambridge, USA. The contract was awarded to them in April 1969.
Raffzahn's user avatar
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9 votes
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How the first ARPANET connection was established?

I would love to be able to visualize how this information was transferred from university to university and what the mainframe computers had to do with it. Mainframes(*1) were the computers people ...
Raffzahn's user avatar
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8 votes

Anecdote in Weinberger's Psychology of Computer Programming: is it ARPANET?

Weinberg had worked as one of the engineers in the design and implementation of a ground tracking network during project Mercury in the us space effort. It's not too much of a stretch that he might ...
Walter Mitty's user avatar
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7 votes
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did people already connect computer with other computers (like a LAN/Intranet) before ARPANET/NPL that sparked the Internet?

This question seems to be mostly about what we did for LANs before ethernet. Sure, we had local area networks, even if we did not call them that. Assuming a bunch of computers not too far apart ...
dave's user avatar
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6 votes

Data on the BBN C/70?

It wasn't a follow-up, it was an alternate microcode load. (I used one for a summer as an intern, supporting the PSN group) The instruction set was evidently modeled after the PDP 11/70, and had very ...
peterd's user avatar
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6 votes

did people already connect computer with other computers (like a LAN/Intranet) before ARPANET/NPL that sparked the Internet?

The underlying idea of ARPANET, or Ethernet, and many other computer networking technologies, is packets. Small standardized blocks of data that are forwarded around from machine to machine, under ...
RETRAC's user avatar
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5 votes
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ARPANET IMP topology using NCP

Early ARPANET logical maps (from 1970 onwards), as well as the geographic maps (note the UTAH spur in the 1969 map), show that it was not a full-mesh topology; there must therefore have been some kind ...
grawity's user avatar
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5 votes

How and what did it mean to connect to ARPANET from home?

re: "What could a "home user" do on the ARPANET in the months/years leading up to the founding of the Homebrew Computer Club in March 1975?" Kids in the mid 70s whose parents had ...
Armand's user avatar
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4 votes

did people already connect computer with other computers (like a LAN/Intranet) before ARPANET/NPL that sparked the Internet?

The early arpanet was composed entirely of Interface Message Processors (IMPS) and Terminal Interface Processors (TIPS). An IMP connected one (or more? I'm not sure) computers to the arpanet, while a ...
Solomon Slow's user avatar
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4 votes
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Data on the BBN C/70?

The C/70 is a follow up to he C/30 which was designed as a replacement/emulation of the Honeywell x16 series used as IMP. The C/30 is a 20 bit implementation using what BBN called their '...
Raffzahn's user avatar
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4 votes

How fast was ARPANET?

Does anyone know how long that message must have been taken to transmit, or an estimate at least? It's two characters, so even considering an inefficient protocol and slow lines (*1) will be ...
Raffzahn's user avatar
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4 votes

How the first ARPANET connection was established?

I would like to know how the first "Lo 'message in the ARPANET network was sent. This is a very specific question, so the answer is therefore specific. The "LO" was typed into a ...
dave's user avatar
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3 votes

Anecdote in Weinberger's Psychology of Computer Programming: is it ARPANET?

I am fairly sure that Weinberg is referring to the US World Wide Military Command and Control System that was developed during the 1960s. When studying project management at uni many years ago WWMCCS ...
Hugh Fisher's user avatar
3 votes

How fast was ARPANET?

When using a packet-switched protocol such as TCP/IP with John Nagle's flow-control algorithm, a system that has sent out a packet of data will hold off on sending further data for the channel until ...
supercat's user avatar
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1 vote

How the first ARPANET connection was established?

Here is a log of how the first session on a remote computer went, in 1969. The user was attmpting to type "LOGIN" on a local terminal, but the network crashed when he got as far as "...
Walter Mitty's user avatar
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