Windows 2.1x

Windows 2.1x, marketed as Windows/286 and Windows/386, is a family of Microsoft Windows graphical user interface-based operating environments.

Windows/286 2.10 and Windows/386 2.10 were released on May 27, 1988, less than six months after the release of Windows 2.0. These versions can take advantage of the specific features of the Intel 80286 and Intel 80386 processors. A hard disk was required for the first time to install Windows.

Editions

Two editions of Windows 2.1x were released, both of which could take advantage of the Intel processor for which they were designed.

Windows/286

Windows/286 takes advantage of the HMA to increase the memory available to Windows programs. It introduced the HIMEM.SYS DOS driver for this purpose. It also includes support for several EMS boards, although this support is not related to the 80286 processor. The segmented nature of 16-bit Windows programs is quite suited to the usage of EMS, as portions of code and data can be made visible in the first megabyte of memory accessible to real-mode programs only when the program using them is given control. Microsoft encouraged users to configure their computers with only 256KB of main memory, leaving the address space from 256-640KB available for dynamic mapping of EMS memory.

UCI race classifications

The Union Cycliste Internationale (UCI), the world's governing body in the sport of bicycle racing, classifies races according to a rating scale.

The rating is represented by a code made of two or three parts and indicates both the type or style of race (the first part), and its importance or difficulty (the second and third parts). The first part can be an integer or an abbreviation, and the second part, when present, are usually integers. Both parts are separated by a period or decimal point (.).

A higher rated race will result in the successful riders receiving more world ranking points.

Road racing

The first part of the codes to rate a road race is '1' for a one-day race, and '2' for a multi-day (stage) race. They are separated from the second part of the classification, the ranking, by a decimal point. 'HC' (beyond categorization, from French hors catégorie) is the highest ranking category, followed by '1' and then '2'. For example, a race rated 1.1 equates to a one-day, category 1 race.

Microsoft Windows

Microsoft Windows (or simply Windows) is a metafamily of graphical operating systems developed, marketed, and sold by Microsoft. It consists of several families of operating systems, each of which cater to a certain sector of the computing industry. Active Windows families include Windows NT, Windows Embedded and Windows Phone; these may encompass subfamilies, e.g. Windows Embedded Compact (Windows CE) or Windows Server. Defunct Windows families include Windows 9x and Windows Mobile.

Microsoft introduced an operating environment named Windows on November 20, 1985, as a graphical operating system shell for MS-DOS in response to the growing interest in graphical user interfaces (GUIs). Microsoft Windows came to dominate the world's personal computer market with over 90% market share, overtaking Mac OS, which had been introduced in 1984. However, since 2012, because of the massive growth of smartphones, Windows sells less than Android, which became the most popular operating system in 2014, when counting all of the computing platforms each operating system runs on; in 2014, the number of Windows devices sold were less than 25% of Android devices sold. However, comparisons across different markets are not fully relevant; and for personal computers, Windows is still the most popular operating system.

Geometry Dash

Geometry Dash is a 2013 mobile game and Steam game developed by Sweden-based developer Robert Topala, and published by his own company RobTop Games. It is a rhythm-based running game which currently has 20 levels. Each level features unique background music. Although the player is not required to complete a level to advance to the next, they increase in difficulty for the most part. Other features of the game that exist in the latest versions are a level editor, map packs, user-created levels, secret coins, user coins, a secret vault and a great variety of icons and game modes.

Gameplay

Geometry Dash uses a simple tapping/clicking system to control different vehicles that react when a player presses anywhere on the touchscreen (space/up key(s) or mouse if playing on the Steam version) and can be held down to constantly interact (on some vehicles). Users cannot control the speed at which the icon is moving, unless it interacts with a speed changing portal. The timing and rhythm are key parts of the game.