Problem: Unix (; trademarked as UNIX) is a family of multitasking, multiuser computer operating systems that derive from the original AT&T Unix, development starting in the 1970s at the Bell Labs research center by Ken Thompson, Dennis Ritchie, and others.

Initially intended for use inside the Bell System, AT&T licensed Unix to outside parties from the late 1970s, leading to a variety of both academic and commercial variants of Unix from vendors such as the University of California, Berkeley (BSD), Microsoft (Xenix), IBM (AIX) and Sun Microsystems (Solaris). AT&T finally sold its rights in Unix to Novell in the early 1990s, which then sold its Unix business to the Santa Cruz Operation (SCO) in 1995, but the UNIX trademark passed to the industry standards consortium The Open Group, which allows the use of the mark for certified operating systems compliant with the Single UNIX Specification (SUS). Among these is Apple's macOS, which is the Unix version with the largest installed base as of 2014.

From the power user's or programmer's perspective, Unix systems are characterized by a modular design that is sometimes called the "Unix philosophy", meaning that the operating system provides a set of simple tools that each perform a limited, well-defined function, with a unified filesystem as the main means of communication and a shell scripting and command language to combine the tools to perform complex workflows. Aside from the modular design, Unix also distinguishes itself from its predecessors as the first portable operating system: almost the entire operating system is written in the C programming language that allowed Unix to reach numerous platforms.
1. what OS is the article about?
2. what is it?
3. where did it come from?
4. when did they let other work on their OS?
5. are there different versions?
6. how do they differ?
7. who released some versions?
8. what was their flavor named?
9. who else?
10. what did they call theirs?
11. anyone else?
12. what were their flavors named?
13. who bought the rights to from the phone company?
14. when?
15. did they resell it?
16. when?
17. who bought it?
18. is that an acronym?
19. what does it stand for?
20. as of 2014 which flavor has the largest install base?
Answer: 1. Unix
2. a family of multitasking, multiuser computer operating systems
3. the original AT&T Unix
4. in the late 1970s
5. Yes
6. some are academic and others commercial
7. the University of California, Berkeley
8. (BSD)
9. Microsoft
10. (Xenix)
11. IBM and Sun Microsystems
12. (AIX) and (Solaris)
13. Novell
14. in the early 1990s
15. Yes
16. 1995
17. SCO
18. Yes
19. the Santa Cruz Operation
20. Apple's macOS

Problem: (CNN)As "Mad Men" returned for its seventh season, many viewers tuned in to see what happened next for Don, Peggy, Pete and the other characters of the hit AMC show. Many were eager to see the fabulous clothes the actors wore.

We can't help but wonder -- was all that glamour real, or is it just the magic of TV? We asked readers to share their snapshots from 1967-69 and show us what the late '60s really looked like.

Janie Lambert, 61, says she thinks "Mad Men" portrays the decade's conservative fashion and mod look accurately. But she remembers the late 1960s as more colorful and vibrant.

"My favorite looks in the '60s were the bright colors and bold patterns, stripes and polka dots, miniskirts, long hair and pale lipstick," Lambert says.

'Mad Men' and the other 1960s

Many iReporters strived to keep up with the fast pace of the changing fashion in the late '60s. Patricia Anne Alfano, 66, went from a British-inspired mod style cheerleader to a hippie in a matter of three years.

In 1967, Alfano was an "Eaglette" -- an NFL cheerleader for the Philadelphia Eagles. Unlike today, the cheerleaders were covered from head to toe. The uniforms had long sleeves, and the cheerleaders wore gloves and cloth helmets.

"From the early 1960s until 1967, I spent tons of time on my hair," she says, noting her mod hairdo in the picture is actually a wig. "Wigs were big back then. Everyone had at least one."

In 1968, the style began to evolve. Alfano still spent a lot of time on her hair, but her peers began heavily criticizing all things materialistic, so the style became more casual.
1. What channel is Mad Men on?
2. Is it a hit?
3. What season is it?
4. Who are some of the characters?
5. What decade does it portray?
6. What are a lot of people excited to see?
7. How does Janie Lambert remember the late '60s?
Answer: 1. AMC
2. yes
3. seventh season
4. Don, Peggy, Pete
5. '60s
6. the fabulous clothes .
7. more colorful and vibrant.

Problem: CHAPTER XIII.

Morning found the settlers, with the exception of Col. Zane, his brother Jonathan, the negro Sam, and Martin Wetzel, all within the Fort. Col. Zane had determined, long before, that in the event of another siege, he would use his house as an outpost. Twice it had been destroyed by fire at the hands of the Indians. Therefore, surrounding himself by these men, who were all expert marksmen, Col. Zane resolved to protect his property and at the same time render valuable aid to the Fort.

Early that morning a pirogue loaded with cannon balls, from Ft. Pitt and bound for Louisville, had arrived and Captain Sullivan, with his crew of three men, had demanded admittance. In the absence of Capt. Boggs and Major McColloch, both of whom had been dispatched for reinforcements, Col. Zane had placed his brother Silas in command of the Fort. Sullivan informed Silas that he and his men had been fired on by Indians and that they sought the protection of the Fort. The services of himself and men, which he volunteered, were gratefully accepted.

All told, the little force in the block-house did not exceed forty-two, and that counting the boys and the women who could handle rifles. The few preparations had been completed and now the settlers were awaiting the appearance of the enemy. Few words were spoken. The children were secured where they would be out of the way of flying bullets. They were huddled together silent and frightened; pale-faced but resolute women passed up and down the length of the block-house; some carried buckets of water and baskets of food; others were tearing bandages; grim-faced men peered from the portholes; all were listening for the war-cry.
1. How many were in the fort?
2. Were they all men?
3. What were they doing?
4. Which were whom?
5. Who was in charge of the fort?
6. Who arrived that day?
7. How many were with him?
8. Where were they from?
9. What were they carrying?
10. Where were they taking them?
11. What did they want from the fort?
12. Why?
13. From whom?
14. Who was missing from there?
15. Where were they?
16. Who is Silas' brother?
17. Where was he?
18. Was he alone?
19. How many were with him?
20. Could they all shoot?
Answer:
1. forty-two
2. no
3. Awaiting the appearance of the enemy.
4. Indians
5. Silas
6. Captain Sullivan, with his crew
7. three
8. Ft. Pitt
9. a pirogue loaded with cannon balls
10. Louisville
11. admittance
12. they sought protection
13. Indians
14. Capt. Boggs and Major McColloch
15. dispatched for reinforcements
16. Col. Zane
17. at his property
18. no
19. Three
20. yes