C H A P T E R 3

Controls

If your application has buttons whose names change during the operation of the application, the application must resize the button when its name changes so that the spacing always conforms to the guidelines.

Naming Text Buttons

Keep button names short. Never use more than three words for a button name, and try to limit button names to one word. Capitalize button names like book titles. That is, always capitalize the first and last words of the name, and capitalize all other words except articles (a, an, the), coordinating conjunctions (for example, and, or), and prepositions of three or fewer letters. Since button names should seldom be more than two words, almost all words in button names should be capitalized.

Avoid punctuation and symbols in button names. Except for very common symbols such as an ampersand (&), users find symbols ambiguous. Do not use ellipses (…) in the button name even if tapping the button displays another slip. However, a button name should begin with a diamond symbol () if the button pops up a picker. (For complete information on pickers, see Chapter 4, “Pickers”).

Naming Take-Action Buttons

A user typically reads the text in a slip until it becomes familiar, and then relies on visual cues, such as button names or positions, to respond. To assist users in quickly spotting which button in the slip initiates an action, name the take-action button with a specific verb such as Print, Fax, or File. These words are self-sufficient, whereas vaguely affirmative names such as OK and Yes require the user to scan other parts of the slip to verify what action the button initiates. Figure 3-4 compares a specific button name to a generic button name in the same context.

3-4Buttons

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Apple 2 manual Naming Text Buttons, Naming Take-Action Buttons

2 specifications

The Apple II is a defining product in the history of personal computing, first introduced in 1977 by Apple Computer, Inc. Designed by Steve Wozniak, the Apple II was one of the first highly successful mass-produced microcomputer products and played a significant role in bringing personal computers into homes and schools.

One of the Apple II's standout features was its color graphics capability. It was one of the first personal computers to provide color output, thanks to its built-in video interface. The initial model supported a resolution of 280x192 pixels with a palette of 6 colors, which allowed for vibrant visuals that set it apart from contemporaries like the monochrome Altair 8800.

The Apple II was notable for its open architecture. This design allowed users to expand the computer's capabilities easily through a series of expansion slots. Users could add floppy disk drives, additional memory, and various peripheral devices, making the system highly adaptable to individual needs. This encouraged a thriving ecosystem of third-party hardware and software, which contributed to its popularity.

Another significant feature was its use of the 6502 microprocessor. This 8-bit CPU was not only affordable but also powerful for its time, allowing the Apple II to run various applications efficiently. Along with a built-in keyboard and an innovative plastic case that housed its components, the design was user-friendly and appealing.

The Apple II also introduced the concept of “bootable software” through the use of floppy disks. The disk operating system (DOS) allowed users to store and run multiple programs without having to reload software manually, providing a level of convenience that had not been widely available before. Key software like VisiCalc, the first spreadsheet program, helped boost sales, showcasing the Apple II's utility in business and education environments.

The computer was also well-known for its early adoption of BASIC programming language. Apple provided an operating system that supported Applesoft BASIC, which enabled users, including students, to write their programs, further fostering a community of developers.

In summary, the Apple II's color graphics, open architecture, powerful 6502 processor, innovative use of floppy disks, and support for BASIC programming made it a revolutionary product in its time. Its legacy laid the groundwork for future personal computers and established Apple as a leader in the burgeoning tech industry. The Apple II remains an iconic symbol of the early personal computing era, reflecting a generation's transition into a digitally connected world.