From mboxrd@z Thu Jan 1 00:00:00 1970 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on polar.synack.me X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00,FREEMAIL_FROM autolearn=unavailable autolearn_force=no version=3.4.4 X-Received: by 10.129.40.198 with SMTP id o189mr20806953ywo.51.1471956692122; Tue, 23 Aug 2016 05:51:32 -0700 (PDT) X-Received: by 10.157.31.88 with SMTP id x24mr96013otx.4.1471956692086; Tue, 23 Aug 2016 05:51:32 -0700 (PDT) Path: eternal-september.org!reader01.eternal-september.org!reader02.eternal-september.org!news.eternal-september.org!news.eternal-september.org!feeder.eternal-september.org!usenet.blueworldhosting.com!feeder01.blueworldhosting.com!peer02.iad.highwinds-media.com!news.highwinds-media.com!feed-me.highwinds-media.com!j37no10160893qta.0!news-out.google.com!d130ni44318ith.0!nntp.google.com!f6no12295804ith.0!postnews.google.com!glegroupsg2000goo.googlegroups.com!not-for-mail Newsgroups: comp.lang.ada Date: Tue, 23 Aug 2016 05:51:31 -0700 (PDT) In-Reply-To: Complaints-To: groups-abuse@google.com Injection-Info: glegroupsg2000goo.googlegroups.com; posting-host=62.219.244.2; posting-account=ow8VOgoAAAAfiGNvoH__Y4ADRwQF1hZW NNTP-Posting-Host: 62.219.244.2 References: <79e591f0-3c3e-42b2-ad1f-3e59a031531e@googlegroups.com> <94756e03-7788-4032-a70b-3a0468fc3af9@googlegroups.com> User-Agent: G2/1.0 MIME-Version: 1.0 Message-ID: <19705580-c6d7-49cf-a830-a5707734071e@googlegroups.com> Subject: Re: Could you write a BSD like os in ADA? From: already5chosen@yahoo.com Injection-Date: Tue, 23 Aug 2016 12:51:32 +0000 Content-Type: text/plain; charset=UTF-8 X-Received-Bytes: 2538 X-Received-Body-CRC: 2506631221 Xref: news.eternal-september.org comp.lang.ada:31516 Date: 2016-08-23T05:51:31-07:00 List-Id: On Monday, August 22, 2016 at 12:49:07 PM UTC+3, Bob Broderbund wrote: > On 2016-08-22, Dmitry A. Kazakov wrote: > > On 22/08/2016 07:01, J-P. Rosen wrote: > >> Le 22/08/2016 ?? 02:18, Andrew Shvets a ??crit : > >>> What would you consider to be a well designed operating system? > >> > >> VMS! :-) > > > > Yes, VMS was likely the best OS ever. > > Close.. try another permutation of the same letters! > > Hint: it's the oldest OS still in development and production, and processes > 95% or more of the world's financial transactions. > IBM MVS/zOS is ~42 y.o. It is certainly not the oldest OS still in development and production. Here are just a few OSes that are older: - Sperry Rand OS 2200 - Burroughs MCP - IBM VM/CMS - UNIX (current variants may have no code from 40+ y.o. original, but many APIs are still here). 95% figure with regard to transactions sounds very questionable. Most likely you made it up. Especially considering that there is no consensus definition for "financial transaction". > > But designing a new OS I would consider doing it really new. No I/O, no > > files, only memory mapped persistent properly typed objects. > > The problem then is getting applications to run on it. > > Bob