One important distinction is client vs. server. ‘Client’ translates as: being lightweight, suppporting only a single user, able to run on small machines, designed to be switched on when needed and off when the user is done, lacking pre-emptive multitasking, optimized for low latency, and putting a lot of its resources into fancy user interfaces. ‘Server’ translates as: being heavyweight, capable of running continuously, optimized for throughput, fully pre-emptively multitasking to handle multiple sessions. In origin all operating systems were server operating systems; the concept of a client operating system only emerged in the late 1970s with inexpensive but underpowered PC hardware. Client operating systems are more focused on a visually attractive user experience than on 24/7 uptime.
The Art of Unix Programming
Oleg Andreev

Software designer with focus on user experience and security.
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Переводы некоторых статей на русский.
Product architect at Chain.
Author of Gitbox version control app.
Author of CoreBitcoin, a Bitcoin toolkit for Objective-C.
Author of BTCRuby, a Bitcoin toolkit for Ruby.
Former lead dev of FunGolf GPS, the best golfer's personal assistant.
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I am very interested in innovative ways to secure property and personal interactions: all the way from cryptography to user interfaces. I am not interested in trading, mining or building exchanges.
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