I've been feeling like rambling, so it's time for a classic ramble. This time we are looking at the origins of books about computers. More specifically, computer books targeted at a general audience. Along the way we stumble into the first public disclosure of digital computers, the first intentionally unimportant machine, and wild speculation abou…

This is a hefty one. I usually try to keep things as accessible as possible, but this time we have to get a little more technical than usual. We are picking up in 1964, with the first proposals for a new version of ALGOL. From there we sail through the fraught waters of ALGOL X, Y, W, and finally 68. Along the way we see how a language evolves over…

ALGOL is one of those topics that's haunted the show for a while. It comes up any time we talk about programming languages, and with good reason. Many of the features and ideas found in modern languages have their roots in ALGOL. Despite that influence, ALGOL itself remains somewhat obscure. It never reached the highs of a C or LISP. In this series…

Originally presented at VCF SoCal in February of 2024. The cryotron, a superconductive switch, almost revolutionized computing. It's one of those fascinating near misses. In this episode we are talking about the history of the cryotron, how the NSA and supercomputing factors into the mix, and the current state of research into the topic. Did the NS…

This is going to be a wild rambling ride. In 1939 a computer called Nimatron was made. It was one of the earliest digital electronic computers in the world. It did one thing: play a game called Nim. Over a decade later, in 1951, another Nim machine hit the scene. This computer called Nimrod, was designed to demonstrate how computers worked... by pl…

This episode wraps up the System/360 trilogy by taking things back to where they started for me. We will be looking at System/360 clones, how they could exist, why they existed, and why IBM didn't crush them. We close with a discussion of how these earlier clones impact our understanding of the IBM PC story. The truth is, by 1981 IBM was no strange…

My coverage of the IBM System/360 continues! In this episode we look at US v IBM, and the fallout that surrounded the release of the System/360. By 1969 IBM already had a history of antitrust litigation. What was IBM doing to upset the Department of Justice, and how does it tie in to the larger story of clone computers? Selected Sources: http://www…

In this episode I sit down and talk with Micki and Steve about VCF SoCal, a new Vintage Computer Festival! The event is taking place in Orange, California on Febuary 16th and 17th. VCFs are a wonderful time, and a great opportunity to meet up with other retro enthusiasts. The weekend will be filled with exhibits and speakers, including myself! I wi…

The release of the IBM System/360 represents a major milestone in the history of computing. In 1964 IBM announced the 360 as the first family of compatible computers. Users could choose a system that was just the right size for their needs, mix and match peripherals, and have no fear of future upgrades. If you started on a low-end 360 you could mov…

Released in 1982, the Jupiter Ace is a fascinating little computer. It's hardware isn't much to write home about. It's just an 8-bit microcomputer very much in line with other systems of the era. Where it shines is it's software. In a period when most home computer ran some version of BASIC the Ace was using Forth. On the surface that might sound l…

Tools are the most important programs in the world. Without quality tools it's impossible to write quality software. One of those most important of those tools, and the most hotly coveted, is the text editor. These programs offer us a window into the digital world. It's no wonder that programmers the world over basically live inside text editors. I…

Most accounts of the early history of programming languages all share something in common. They all have a sentence or two explaining how there was great resistance to these new languages, but eventually all programmers were won over. Progress was made, despite the forces of counterrevolutionaries. What you won't find in most histories are the actu…

Have you ever opined for a simpler time? Have you ever wanted a computer that you can understand all the way down to the silicon? Then RCA's COSMAC might be the architecture for you! COSMAC was a simplified computer architecture designed in the early 70s. It's tiny, cheap, and built to be easy to understand. But is the chip actually useful? Selecte…

This episode we are looking at a ghost of bygone days: batch processing! Before fancy terminals peppered computer rooms, before there was a microcomputer on every desk, there was the batch. In this non-interactive form of computing a user could wait hours, days, or even weeks to get a chance at computer time. Machines were kept well away from progr…

It's finally Spook Month here on Advent of Computing! To kick things off I'm tackling a bit of a mystery. Between 1972 and 1982 there is only one well documented virus. This period is book ended with plenty of sources and, yes, even viruses. But this decade long span of time has almost nothing! Was this era truly safe from the grips of malicious co…

Byte has to be one of the most recognizable parts of the digital lexicon. It's an incantation that can be recognized by even the uninitiated. But where does the byte come from? Has it always existed, or did it more recently come into being? And, more specifically, why is a byte 8 bits? Is it some holdover from long ago, or is there some iron clad r…

It's finally time! In this episode we are looking at the Monte Carlo method, perhaps the first practical computer program that could outpace human capability. The best part: the method relies on a random walk to reach a statistically valid answer! Selected Sources: https://www.osti.gov/servlets/purl/10596 - Igniting the Light Elements https://libra…

I will admit, the title here is a bit of click bait. In the early 1950s a researcher named Nils Aall Barricelli started in on a bold project. His goal was to simulate evolution on a computer and, in doing so, create a perfect lab to study evolutionary processes. What he found was astonishing. Given a simple rule set these interesting patterns emerg…

This episode is simply a reading of the Story of Mel. I opened last episode with an excerpt, but didn't feel right leaving it at that. So, I present, the Story of Mel as written by Ed Nather and preserved in the Jargon file.

In 1956 Librascope released the LGP-30, a truly wild machine. It was, for the time, the most simple and cheap machine that could actually be useful. It was the size of a desk when contemporary machines took up small rooms. It plugged into a normal wall outlet while other machines requires special power feeds. It was, perhaps, the first hint of a pe…

I'm wrapping up my dive into Prolog with... Prolog itself! This episode I'm actually covering the development of Prolog, using all the natural language processing lore we covered last time. Along the way we will see how Prolog developed from a set of tools, and how those tools were generalized into a useful language. Selected Sources: http://alain.…

I've been told I need to do an episode about Prolog. Well, here's the start of that process. To talk about Prolog we first need to come to grips with natural language processing, it's tools, and it's languages. This episode we are doing just that, going from ELIZA to Planner ro SHRDLU in an attempt to figure out how AI was first taught human tongue…

Space is cool, in all meanings of the word. Not only is it wondrous, vast, and fascinating, it can also be a cold place. It's also a very useful place to put things. This episode we are looking at the first practical use of space: communication satellites. Selected Source: https://archive.org/details/BigBounc1960 - The Big Bounce https://archive.or…

I don't usually cover video games. When I do, you know it's for a weird reason. This episode we are looking at the Atari VCS 2600, it's strange hardware, and how it fits into the larger story of the rise of microprocessors. These new tiny chips were already changing the world, but they brought along their own problems. Selected source: https://spec…

What really is the deal with microcontrollers? Are they just little computers... or are they something totally different? This episode we are looking at the development of the microcontroller through the history of the TMS1000.

This episode we pick back up where we left off. We are looking at the roots of the Mundaneum, the applications of the Universal Decimal Code, and how it call connects to hypertext. Selected Sources: https://web.archive.org/web/20051227184732/http://people.lis.uiuc.edu/~wrayward/otlet/xanadu.htm - Visions of Xanadu https://www.ideals.illinois.edu/it…

The Internet is the closest we've come to a universal store of all human knowledge. However, it's not the first pass at this lofty goal. In this episode(and the next) we are looking at the Mundaneum, a project started in the 1890s to address the information problem. How is it connected to the larger story of hypertext? And how can this older projec…

Back in episode 90 I made a passing reference to the Cyclops, the first consumer digital camera. It's this masterstroke of hackery that uses a RAM chip as a makeshift image sensor. In this episode I'm coming back around to the Cyclops and taking a look at the origins of digital imaging in general. Selected Sources: https://www.youtube.com/watch?v=1…

The Apple III was a pretty slick machine... in theory. From a lack of launch software, to strait up hardware failures, Apple's 3rd computer didn't really win in the market place. Why was that? Was the machine setup for failure from the start? Was it's case really designed before it's motherboard? When it comes to the III there's a surprising amount…

We're finally taking a look at Sketchpad. This program was completed in 1963 as Ivan Sutherland's Ph.D. research. On the surface it looks like a very fancy drawing program. Under the hood it's hiding some impressive new programming techniques. Selected Sources: http://worrydream.com/refs/Sutherland-Sketchpad.pdf - Sutherland's Sketchpad thesis http…

This episode I attempt to find the first interactive computer text interface. All I can say is, well, it's a journey. Selected Sources: https://sci-hub.se/10.2307/3917015 - Early article on Stibitz's CNC Model I https://archive.org/details/fortranprimer0000orga/page/103/mode/1up?view=theater - Primer on the FORTRAN Monitor System https://kyber.io/r…

This episode picks up where we left off last time. We are looking at Ada and its applications. How does Ada handle tasking? What's the deal with objects? And, most importantly, what are some neat uses of the language? Selected Sources: https://dl.acm.org/doi/pdf/10.1145/956653.956654 - Rationale for the Design of Ada https://trs.jpl.nasa.gov/bitstr…

Ada is a fascinating language with a fascinating history. It was initially developed as part of a Department of Defence project. The plan was to create a standardized language for everyone inside the DoD. The results, well, they may just surprise you. Selected Sources: http://archive.adaic.com/pol-hist/history/holwg-93/holwg-93.htm - Ada at the HOL…

Advent of Computing has finally reached 100 episodes! Today we are taking a break from the usual content to discuss the show, it's arc, and some of the mysteries I have yet to solve.

UNIX is a big deal. It's one of the most influential programs in history. Most operating systems that we use today can trace their lineage back to UNIX. The only notable exception at this point is Windows. But all these new-fangled operating systems aren't blood relatives of UNIX, they are all derivatives. Second cousins, if you will. So how did we…

This time we are looking at a somewhat obscure machine: the Canon Cat. Designed by Jef Raskin, the Cat is sometimes called the spiritual successor to the Macintosh. That's a nice little epitaph, but doesn't fully explain the tangled mess of things between Raskin, Jobs, Apple, and the Mac. Today we will try to untangle some of that mess as we examin…

We've approach the beast itself: SQL. Or, as it used to be known, SEQUEL. In this episode we will discuss how early navigational databases failed, and how we were able to move past them into a relational future. It's a fascinating tale about how careful research and planning can lead to much better tools. Selected sources: https://www.seas.upenn.ed…

I've fallen into a bit of a data rabbit hole, and you get to join me. In this episode I'm starting my journey to understand where databases came from, and how they started to evolve. This will serve as a foundation for next episode, when we will dive into one of the most popular databases from the 1970s: SQL. Along the way we wrestle with GE, the r…

So far I've strayed away from hypermedia in my larger hypertext coverage. This episode helps to fix that. Today we are looking at Aspen Movie Map, a project from 1978 that created a virtual Aspen, Colorado. Why would you want to digitize an entire city? Why did DARPA fund a trip to Aspen? And how does this link up with hypermedia? All this and more…

Robots have always fascinated and horrified humanity in equal measure. The prospect of a synthetic lifeform is at times exciting, but can quickly turn south. Luckily we've never gotten that far... or have we? This episode we will look at a selection of early robots, from the Mechanical Turk to Elektro. All have one thing in common: they run off smo…

Anybody up for a fright? This episode we are looking at 3 of the earliest horror video games I can find. Over this journey we will look at different programmatic ways to instill fear, how platforms can affect the route to terror, and even dig up the mystery of the first horror game. Selected Sources: http://www.twenex.org/ - Sign up for an account …

It's Spook Month 2022! To kick things off we are diving into the frustrating depth of copy protection, piracy, and the origins of commercial software. In 1969 the Great Unbundling made the software market viable for the first time. Ever since then pirates and software vendors have been locked in a battle over bits. This episode traces the early day…

Whirlwind represents a fascinating story of transition. The project started in the middle of the 1940s as an analog machine. As times changed it became a digital device. By 1951 it was perhaps the fastest computer in the world, filled to the brim with new approaches to design and new technology. It may have even been host to the first video game. S…

In the last half of the 70s there was one gold standard in home computing: S100. This was a standardized bus that was the heart of many computers. It allowed for the interchange of parts from different manufacturers. Best of all, the S100 bus was simple. This made for a wonderful platform for hobbyists, and helped jump start the home computer revol…

What language has two stacks? What language is used on satellites and in home computers? What language deals in words? Why, Forth, of course! Forth is a highly unique language developed in the 60s by Chuck Moore. And when I say unique, I mean unique. Forth uses reverse polish notation for all operations, along with a dedicated data stack for passin…

Digital animation has really become an artform in and of itself. In the current epoch these animations play out on fancy bitmapped displays, but it's origins are far more visceral. Or maybe we should say far more hacky. This episode we are diving in to BEFLIX: an early animation toolchain from Bell Labs that produced computer films on physical roll…

Can a computer be creative? Can we program a machine to make art? It turns out the answer is yes, and it doesn't even take artificial intelligence. This episode we are diving in to the ILLIAC Suite, a piece for string quartet that was composed by a computer. Along the way we will examine the Markov Chain Monte Carlo method, and how methods used to …

What is a computer? A miserable pile of electrons! But... not necessarily. I have yet to find a fully satisfying definition for "computer" that encompasses the full grandeur of calculating machines. This episode we are further complicating that quest by adding fluid based computers to the mix. We will be looking at 3 machines that crunched numbers …

More Visi-fun ahead! Today we are looking at Visi On, a visionary user interface developed for home computers. Along the way we will discuss smalltalk, portability, and how the slick graphics over at Xerox were adapted to run on smaller machines. Selected Sources: http://toastytech.com/guis/vision.html - Toasty Tech's Visi On page, with screenshots…

Today we are looking at VisiCalc, the original killer app. Hitting the market in 1979, VisiCalc was the first computer spreadsheet program. Through it's 6 year lifespan it was ported to everything from the Apple II to the IBM PC to the Apple III. It dominated the market and then... it disappeared. Selected Sources: https://conservancy.umn.edu/handl…