1985, I started to work at a telecom equipment manufacturer. We had a main frame computer in our combined office- and lab room. We were four sitting in the room and it was this one terminal for all of us and maybe even for someone more.

Downstairs, we at component technology department had our big climate controlled laboratories. I used an HP 85 computer having the Basic programming language to automize measurements of resistors. And there were several more of them for other measurements of various electronic components. Also more advanced computers were used in the labs and as I recall also with other languages than Basic. I remember I learned briefly a bit about one of those languages but have forgotten which one.

The secretary at the department could send Telex messages around the world. We handed a hand written manuscript to her and she typed it into the Telex system. And she had a Xerox computer with big, at least the 8 inch floppy discs.

Not so many years later my manager got a Personal computer running DOS and some years later it DOS computers also to the staff. But also very early we had a Sun Unix station. And for many years Unix became my daily driver at work.

Before I started to work, in school we had some education in Basic programming. We were using the at least in Sweden very successful and good Luxor ABC 80 computer. At the end of my school time, my school got the top notch ABC 800 with colour screen.

At home so I could get a chance to learn somewhat more about computers and Basic programming in my own pace, I got a Zinclair ZX 80 computer, which I later upgraded to ZX 81.

One summer job when I was a student I was at Televerket, the Swedish PTT. It meant that I visited numerous of exchange stations. Many at the country side, some with very few subscribers so I could hear the relay start when someone was making a call. At bigger stations it was noise from relays all the time.

As I mentioned, after studies were completed I was working with telecom equipment in particular for land line telephony. Not at least I worked with components for the line cards, the card at the telephone exchange that is facing towards the end user.

The book The_Cuckoo's_Egg is a hacker thriller based on a true story that happened in the mid-1980's going on for a year. It was written by the hunter shortly after.

Cliff Stoll describes Unix commands, which are similar to Linux. He talks about passwords, about encryption and a lot more. Many technical details he describes by using analogy with more common non technical life examples.

A security hole in GNU-Emacs software, a software still around today, plays a central role in how the hacker could penetrate. To fix and update security holes are very relevant today as well.

Many things in computers and technology have changed. But at the same time very much of the problems are valid today although they are somewhat different. And the way he describes technical details for the non-technical reader are relevant also today, I believe.

At the same time as the book has many technical details, he also describes the daily life at home, the left wing culture he belonged to at the university, his long hair and the dress code he belonged to. And the music. He also describes his contacts to numerous authorities and frustration in those contacts. I am very impressed of his analytical research approach, his persistence, his skills and inventiveness including inventiveness of his girl friend and others.

One take away for me is that he kept a detailed log book. It is an important research tool. The log book together with the print outs of exactly what the hacker did were core references for analyzing and make conclusions, retract and change conclusions when new information lead to that earlier assumptions were wrong.

He also wrote a technical paper about it before he wrote the book. For those interested, there are several videos with him of later date on various topics.