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Welcome to Advent of Computing, the show that talks about the shocking, intriguing, and all too often relevant history of computing. A lot of little things we take for granted today have rich stories behind their creation, in each episode we will learn how older tech has lead to our modern world.
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Episode 193 - Digital Dating... SCAM?
Computers can do anything! They can open new fields of study, connect the world, and solve impossible problems. But can they find you love? The answer may be yes. That is, if you can escape all the scams, hoaxes, and odd happenings in the w
Episode 192 - Local Computer Held Hostage!
Have you ever wanted to use your computer, only to realize that it had been taken hostage? Over the decades there have been a number of cases where machines have been used as leverage against their owners. Today we look at tales of these di
Episode 191 - The BHP Virus
I bet you can't make a virus for a home computer. That challenge was the start of an interesting saga. It would end with an honest to goodness computer virus spreading among Commodore 64 users. That virus may have made it as far as America
Episode 190 - Machine Room or DEATH TRAP!?
Boo! Welcome to Spook Month 2026! I start off my scary coverage by looking at the dangers of the mainframe rooms of the 50s and 60s. We all know that running computers can be a drag. But can it be deadly? Answering that question takes me th
Episode 189 - The IBM 701
At the end of the 1940s IBM stood at a crossroads. The punch card company had yet to enter the electronic computer market. Forces within and without were pushing them in that direction, but many man in blue suits would resist the coming cha
Usagi Electric and the LGP-21 Restoration
Who can't resist Librascope hardware? Well, me, for one. And David from Usagi Electric is in the same boat. In this episode we sit down to talk about his LGP-21, how he got it, how he got it working, and what the machine can do! Subscribe t
Episode 188 - Training and Teaching with the Bi-Tran Six
How did you learn about computers? And how in depth was your education? For some the answer is the Bi-Tran Six: an educational machine released in 1965. This was one of the first computer trainers, and it represents a very interesting take
Episode 187 - What's Better Than Binary?
Binary is synonymous with digital computing. But is it the only way to crunch numbers? The short answer is no. The long answer, well, that's today's topic. Today we are talking about ternary, aka base 3. From it's early uses in the 19th cen
LIVE from VCF West - Wait, Is That Really UNIX?
It's no secret that I've been fascinated by odd UNIX clones for a while. When I got invited back to speak at VCF West this year I decided to share that fascination with a captive audience. In this talk we look at Idris and CROMIX, and ask t
Episode 186 - MADDIDA
In 1950 Northrup unveiled their MAgnetic Drum DIgital Differential Analyser. The machine is a wild piece of technology; a rendering of an analog computer in digital encoding. But how did we get here? How did a project to guide a missile lea
Episode 185 - Is EMUL-8ion a Form of Flattery?
EMUL-8 is a fascinating programming language. It's described in just one paper from 1977. It's a mix of features from APL, LISP, ALGOL, and SNOBOL. And, I think, it's a wonderful window into how counterculture and home computing collided.
Episode 184 - What Is A Programming Language?
I mean that both in the specific and the abstract. This episode we are looking at APL, which stands for A Programming Language. APL was developed in the mid 50s, but didn't see a working implementation until 1965. It's a language that truly
Dale Biagio - Hello, World!
Dale Biagio(author of Hello, World!) got in touch with me recently. He said he had a book full of short histories of programming languages. Better still, it has sources! How could I resist! In this episode I sit down with Dale to talk about
Episode 183 - A Digital Gap?
I've been browsing old compur surveys and trying to build up a comprehensive data set. What I've found is a little surprising: between late 1945 and 1949 only 10 new computers entered service. Once we get to the 50s that number explodes. Wh
Episode 182 - Spinning Memories
What connects IBM, the NSA, the Third Reich, and high fidelity recordings of symphonies? The answer is: magnetic drum memory. Join me as I lose all track of scope and plot to discovery just how and why magnetic drum memory was invented. Lik
Episode 181 - RAYDAC
In 1947 Raytheon signed a contract to make their first computer. It would be their last... at least for many many years. The fruits of this contract was RAYDAC. Early digital computers were odd, to say the least. And RAYDAC distinguishes it
Episode 180 - You Wouldn't Magnetize a Tape!
The image of a mainframe is almost always accompanied by it's companion: the magnetic tape drive. For decades magnetic tape served as the medium of choice for computing. It was faster than punch cards, and more available than hard drives. B
Episode 179 - Programming Block by Block
In which we discuss GPSS: the General Purpose Simulation Language. As for as languages go, this is a unique one. It's designed for certain types of simulations. It's code is just a handy way to feed a flowchart into a computer. It's design
Episode 178 - The Programma 101
The Olivetti Programma 101 isn't quite like any other machine. On first glance it looks like a big desktop calculator. Inside, it's a purebred computer... but strange one. It uses twisted spring steel for memory, has no addresses, and it's
Dan Temkin - Forty-Four Esolangs
Dan Temkin has been a long time friend of the show. I finally got the chance to sit down and talk with him about one of his latest projects. Forty-Four Esolangs is a "The first artist's monograph of programming languages". During this inter
Episode 177 - Getting Real with RSX
Who wants to hear me make incorrect assumptions about old software? RSX is a system that, from the outside, can sound like it has a similar story to that of UNIX. First developed for the PDP-15 in 1969, RSX becomes much more well known when
Episode 176 - Is That Even UNIX?
UNIX is beloved by many. It's the classic minicomputer operating system. It's big, it's powerful, it's multitasking, and it has some very specific memory requirements. So what happens when you try and get UNIX to run on a microcomputer? Hil
Episode 175 - SNOBOL? That's Disgusting!
Today we are talking about one of the most unique languages I've ever come across. SNOBOL emerges from the early days of programming. It's first compiler is implemented on the back of an envelope. It only has one data type, and only one for
Episode 174 - The Bell Model I
We are getting back to the actual digital family tree. In 1937 George Stibitz built a tiny binary adding circuit on his kitchen table using scraps he "liberated" from his job at Bell Labs. In 1940 he demonstrated a machine he called a compu
Episode 173 - Hybrid Programming
Hybrid computers are composed of a digital computer linked to an analog computer. That leads to an interesting challenge: how do you write software for one of these things? The analog side actively resists programming, while the digital sid
Episode 172 - Analog/Hybrid
In 1945 the first electronic digital computers sparked to life. Number crunching was instantly changed forever! The perfect technology had arrived, and there was never even a competition, right? Well, not so much. The simple fact is that co
Episode 171 - What Is a 4GL?
Last episode I said that Fourth Generation Languages were a topic for another time. Well... this counts as another time. Today we are trying to figure out what exactly makes a language 4th Generation. Along the way we will see why the term
Episode 170 - Thoroughbred/OS
I'm back to normal episodes, and I'm running out the gate with a weird one. Thoroughbred/OS was a multi-user and multi-tasking operating system for the IBM PC. It's mian interface was... BASIC of all things! What exactly is this oddity? htt
Episode 169.5 - Ben Zotto and the Story of Sphere Computers
I recently had the chance to talk to Ben Zotto about his upcoming book: Go Computer Now! - The Story of Sphere Computers. It's all about an obscure machine powered by the Motorola 6800 that released in 1975. I figured it was the perfect fai
Episode 169 - Dellinger's Viruses
In 1981 Joe Dellinger attempted to create the perfect computer program: a virus that spread silently. In 1982 a revision of that virus broke containment. It would have remained completely hidden if it wasn't for an obscure Apple II game. To
