In football, a team has 11 football players, one goalkeeper and 10 other players, consisting of defenders (defenders), midfield ( Midfielder) and attackers (forwards). depending on the map system used Those positions will also indicate the role and playing area of that position as well.

At first there were only forwards, half-backs and thrice quarterbacks. (three-quarter-backs), the first period named like this because It was during the 19th century that the 2–3–5 system was widely popular. The defense will have full-backs known as left-back and right-back. The midfield has left-half (left-half), center-half. (centre-half) and right-half (right-half) and in the offensive line is an outside-left. (outside-left), inside-left, center striker center-forward, inside-right and outside-right (outside-right) After that, the style of the system evolved to have many titles. For example, in the early 1970s, the term "half-back" was replaced by the term "midfielder", referring to the position played in midfield both in the middle of the field and on the flanks. The central midfielder has further evolved into an attacking midfielder and a defensive midfielder.
in modern games Positions in football are strictly defined like rugby or American football. Even so, most players tend to play in the same position throughout their careers. Because each position uses different skills and physical abilities. But there are some footballers who can play in multiple positions. which is called "Useful player" Today I will talk about Abbreviations used to refer to football positions.What are they?

abbreviation for the position of a player in a sport

GK = Goalkeeper = goalkeeper

CB = Center back = Center back support player (central defender)
center half = is a central defender, such as Rio Ferdinand is a center half
The back (back) is a defender along the line.
where the back is actually all defenders.
Both center back and left back and right back.

LB = Left Back = Left line defensive player

RB = Right Back = Player at the right back

DM = Defensive midfield = Midfielder (referring to the midfielder standing in the middle of the field)

CM = Creative midfielder = Midfield player in the middle

LM = left midfield = player positioned in the left midfield

RM = right midfield = right midfield player

AM = attacking midfielder = player positioned in the attacking midfield

CF = center forward = independent center front
(It will be behind the striker, the target can either shoot by himself or pass the ball to the striker)

LW = left winger= left striker

RW = right winger= right striker

ST= Striker= Striker

Goalkeeper

Goalkeeper is the most defensive position in football. The goalkeeper's main job is to stop the other team from scoring by catching, palming or punching the ball from shots, headers and crosses. Unlike their teammates, goalkeepers typically remain in and around their own penalty area for most of the game. As a result, goalkeepers have a better view of the pitch and often give advice to their defence when the other team is on the attack or during set pieces. Goalkeepers are the only players on the pitch who are allowed to handle the ball, but this is restricted to their own penalty area. Positioning is another important job and is one of the hardest to master as keeper.

Goalkeepers must also wear a different coloured kit from the outfielders and officials. Common colours include yellow, green, grey, black and shades of blue. Since the 1970s, goalkeepers have also typically worn specialised gloves. They provide better grip on the ball and protect their hands from hard shots and headers, as well making it easier to punch or push the ball away. Caps were common between the 1910s and 1960s, as well as woolly jumpers, but these are not worn in any professional or semi-professional context today.

Unlike the other positions the goalkeeper is the only required role in a football match. If a goalkeeper gets sent off or injured another goalkeeper must take their place in goal. If that is not possible an outfielder must do so and wear the goalkeeper's shirt.

Defender

Defenders play behind the midfielders and their primary responsibility is to provide support to the team and to prevent the opposition from scoring a goal. They usually remain in the half of the field that contains the goal they are defending. Taller defenders will move forward to the opposing team's penalty box when their team takes corner kicks or free kicks, where scoring with one's head is a possibility.

Midfielder

Midfielders (originally called half-backs) are players whose position of play is midway between the attacking forwards and the defenders. Their main duties are to maintain possession of the ball, taking the ball from defenders and feeding it to the strikers, as well as dispossessing opposing players. Most managers field at least one central midfielder with a marked task of breaking up opposition's attacks while the rest are more adept to creating goals or have equal responsibilities between attack and defence. Midfielders can be expected to cover many areas of a pitch, as at times they can be called back into defence or required to attack with the strikers. They are more often the players that initiate attacking play for a team.

Forward

Forwards (or strikers) are players who are positioned nearest to the opposing team's goal. The primary responsibility of forwards is to score goals and to create scoring chances for other players. Forwards may also contribute defensively by harrying opposition defenders and goalkeepers whilst not in possession. The most common modern formations include between one and three forwards; for example, a lone striker in a 4–2–3–1, paired strikers in a 4–4–2 or a striker and two wingers in a 4–3–3.

Coaches will often field one striker who plays on the shoulder of the last opposing defender and another attacking forward who plays somewhat deeper and assists in creating goals as well as scoring. The former is sometimes a large striker, typically known as a "target man", who is used either to distract opposing defenders to help teammates score, or to score himself; the latter is usually of quicker pace, and is required to have some abilities like finding holes in the opposing defence and, sometimes, dribbling. In other cases, strikers will operate on the wings of the field and work their way goalwards. Yet another variation is the replacement of the target man with a striker who can thread through-balls.

Players who specialise in playing as a target are usually of above-average height with good heading ability and an accurate shot. They tend to be the "outlet" player for both midfielders and defenders, able to "hold the ball up" (retain possession of the ball in an advanced position while teammates run forward to join the attack). They tend to score goals from crosses, often with the head, and can use their body strength to shield the ball while turning to score.

Other forwards may rely on their pace to run onto long balls passed over or through the opposition defence, rather than collecting the ball with their back to goal like a target man. Some forwards can play both of these roles equally well.

In conclusion, we will get to know about football. There must be a total of 11 people. One team has 11 players, 1 Goalkeeper and 10 other position players, consisting of defender. (Defender position), Midfielder (Midfielder) and Attacker (Forward), depending on the map system used. Which those positions will indicate the duties and areas of the play of that position and the abbreviation of the footballers, but what is the abbreviation? I hope the information I publish today will be more or less information for those who are interested in football.

Reference

Association football positions.Abbreviations used to refer to football positions.[Online].Accessible  https://en.wikipedia.org/wiki/Association_football_positions#Centre_forward

Defender (association football).Abbreviations used to refer to football positions.[Online].Accessible https://en.wikipedia.org/wiki/Defender_(association_football)

Midfielder (association football).Abbreviations used to refer to football positions.[Online].Accessible https://en.wikipedia.org/wiki/Midfielder