Comment by charles-salvia | Hacker News Reader

Comment by charles-salvia | Hacker News Reader

The best way to think about the Bloomberg terminal is a web browser that connects you to a private network. (Bloomberg actually is the largest known private network.) Once connected, you have access to thousands of "web apps" - which Bloomberg users call "functions". Instead of a URL, you use a short 2 to 5 letter mnemonic code for each function, such as "MSG" for email, or "TOP" for top news. These different functions provide all sorts of various functionality - most of them are of course related to financial information. Functions like "CDSW" are for analyzing credit default swaps, "SDLC" gives you supply chain data for different companies, other functions analyze or curate Twitter, others correlate news events with historical stock data, etc. There are also many non-financial functions as well that reflect the "social network" aspect of the Bloomberg terminal, such as "POSH" which is basically a high-end Craigs list, or "DINE" which is a high-end Yelp.

All-in-all, the Bloomberg Terminal is like a private Internet for financial professionals.

Your remark about Bloomberg being the largest private network is interesting. By what measure it is the largest (#people, #machines, miles of links?) and which ones count as private?

IDK, I can't help but wonder if this is the result of everyone else moving to more modern standards and leveraging shared infrastructure while the Bloomberg folks double down on a legacy architecture.

I could buy largest private financial network, but it's hard to verify a claim like this when the Chinese network behind the great firewall could be considered a private network (measuring by the intent rather than the implementation).

SIPRNet is probably an order of magnitude larger with over four million users [1]. Even more impressive considering it isn't connected to the Internet.

[1] https://en.m.wikipedia.org/wiki/SIPRNet

I wonder what exactly "isn't connected to the internet" means. Every time we build a military installation, we lay a dedicated cable from its nearest neighbor? That can't be right.

Maybe it's mostly using satellite connections?

Seems like there'd be many times (particularly in the US) where tunneling an encrypted connection over a civilian ISP would be worlds better than the next best option. Maybe not even at the IP level, but a dedicated wavelength on some existing AT&T fibre, for example.

Seems like they have their own network of satellites and terrestrial wires, with less secure stuff going through the internet. This is interesting enough to me that I'd research further but the amount of jargon and acronyms has turned me away.

> Provide DISN-provided transport and information services used for > data, voice, video, and cross domain through a combination of terrestrial, > aerial, satellite assets, and services IAW DODD 5105.19 (reference c). > Transport services include information transfer services between CC/S/A > installations, facilities, and enclaves, for connections to external mission > partner and defense contractor ISs and networks, and wide area network > information transfer.

http://web.archive.org/web/20120914011329/http://www.dtic.mi...

Minor correction: it technically is connected to NIPR ("the internet") via cross-domain guards. Most information would go one-way, low to high, but very specific applications do warrant information going from Secret to unclassified in a very controlled manner, especially when it is time sensitive.

It is actually an incredibly interesting topic, but it is hard to get much information on the specifics online (I assume many details are classified or at least SBU).

The only times I've seen high-to-low transfer was through physical media, primarily optical disc. I wasn't aware that there was any wire between them.

I believe that the Silver Springs network in california is the largest in terms of nodes.

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